diff --git a/src/device/DeviceTags.tsx b/src/device/DeviceTags.tsx
index 7806a59..ab1d8a5 100644
--- a/src/device/DeviceTags.tsx
+++ b/src/device/DeviceTags.tsx
@@ -8,7 +8,6 @@ import {
   ListItem,
   ListItemIcon,
   ListItemText,
-  Theme,
   Typography
 } from "@mui/material";
 import { makeStyles } from "@mui/styles";
@@ -19,10 +18,10 @@ import TagSettings from "common/TagSettings";
 import { Device, Tag } from "models";
 import { filterByTag } from "pbHelpers/Tag";
 import { useDeviceAPI, useSnackbar, useTagAPI } from "providers";
-import React, { useEffect, useRef, useState } from "react";
+import React, { useCallback, useEffect, useRef, useState } from "react";
 import { pond } from "protobuf-ts/pond";
 
-const useStyles = makeStyles((_theme: Theme) => {
+const useStyles = makeStyles(() => {
   return ({
     addIcon: {
       color: "var(--status-ok)"
@@ -45,19 +44,19 @@ function AddDeviceTag(props: AddDeviceTagProps) {
   const [searchValue, setSearchValue] = useState("");
   const [tags, setTags] = useState<Tag[]>([])
 
-  const loadTags = () => {
+  const loadTags = useCallback(() => {
     tagAPI.listTags().then(resp => {
-      let newTags: Tag[] = [];
+      const newTags: Tag[] = [];
       resp.data.tags.forEach((tag: pond.Tag) => {
         newTags.push(Tag.create(tag))
       })
       setTags(newTags)
     })
-  }
+  }, [tagAPI])
 
   useEffect(() => {
     loadTags()
-  }, [])
+  }, [loadTags])
 
   const tagItems = tags
     .filter(tag => !deviceTags.some(tagSettings => tagSettings.key === tag.settings.key))
@@ -144,10 +143,10 @@ export default function DeviceTags(props: DeviceTagsProps) {
   const [deviceTags, setDeviceTags] = useState<pond.TagSettings[]>(device.status.tags);
   const previousDeviceRef = useRef(device);
 
-  const loadTags = () => {
+  const loadTags = useCallback(() => {
     // setLoading(true)
     tagAPI.listTags().then(resp => {
-      let newTags: Tag[] = [];
+      const newTags: Tag[] = [];
       resp.data.tags.forEach((tag: pond.Tag) => {
         newTags.push(Tag.create(tag))
       })
@@ -155,7 +154,7 @@ export default function DeviceTags(props: DeviceTagsProps) {
     }).finally(() => {
       // setLoading(false)
     })
-  }
+  }, [tagAPI])
 
   useEffect(() => {
     if (previousDeviceRef.current !== device) {
@@ -166,14 +165,16 @@ export default function DeviceTags(props: DeviceTagsProps) {
 
   useEffect(() => {
     loadTags()
-  }, [])
+  }, [loadTags])
 
   const addTag = (tag: Tag) => {
     if (!deviceTags.some(dt => dt.key === tag.settings.key)) {
       deviceAPI
         .tag(device.id(), tag.settings.key)
         .then(() => {
-          setDeviceTags([...deviceTags, tag.settings]);
+          setDeviceTags(current =>
+            current.some(dt => dt.key === tag.settings.key) ? current : [...current, tag.settings]
+          );
         })
         .catch(() => error("Failed to tag device as " + tag.name));
     }
@@ -184,7 +185,7 @@ export default function DeviceTags(props: DeviceTagsProps) {
       deviceAPI
         .untag(device.id(), tag.key())
         .then(() => {
-          setDeviceTags(deviceTags.filter(t => tag.key() !== t.key));
+          setDeviceTags(current => current.filter(t => tag.key() !== t.key));
         })
         .catch(() => error("Failed to remove tag " + tag.name + " from device"));
     }
@@ -197,7 +198,7 @@ export default function DeviceTags(props: DeviceTagsProps) {
   return (
     <React.Fragment>
       {deviceTags?.map(tagSettings => {
-        let pondTag = pond.Tag.create({ settings: tagSettings })
+        const pondTag = pond.Tag.create({ settings: tagSettings })
         return (
           <Grid key={"device-tags-"+tagSettings.key}>
             <DeviceTag tag={Tag.create(pondTag)} removeTagFromDevice={removeTagFromDevice} />
diff --git a/src/pages/PageContainer.tsx b/src/pages/PageContainer.tsx
index 3f0e605..5ff0a9d 100644
--- a/src/pages/PageContainer.tsx
+++ b/src/pages/PageContainer.tsx
@@ -1,4 +1,4 @@
-import { Container, SxProps, Theme } from "@mui/material";
+import { Container, SxProps, Theme, Typography } from "@mui/material";
 import { makeStyles } from "@mui/styles";
 import classNames from "classnames";
 // import { useMobile } from "hooks";
@@ -47,6 +47,23 @@ const useStyles = makeStyles((theme: Theme) => ({
     flexDirection: "column",
     justifyContent: "center",
     alignItems: "center"
+  },
+  buildInfo: {
+    position: "fixed" as const,
+    bottom: 56,
+    left: 8,
+    fontSize: 10,
+    lineHeight: 1.3,
+    opacity: 0.35,
+    color: theme.palette.text.secondary,
+    pointerEvents: "none" as const,
+    zIndex: 1,
+    [theme.breakpoints.up("sm")]: {
+      bottom: 8,
+    },
+    [theme.breakpoints.up("md")]: {
+      left: `calc(${theme.spacing(9)} + 8px)`,
+    }
   }
 }))
 
@@ -78,8 +95,13 @@ export const PageContainer: React.FunctionComponent<Props> = (props: Props) => {
       }}
       disableGutters
       maxWidth={false}
-      children={<>{children}</>}
-    />
+    >
+      {children}
+      <Typography component="div" className={classes.buildInfo}>
+        {new Date(__BUILD_DATE__).toLocaleDateString()}<br />
+        {__GIT_HASH__}
+      </Typography>
+    </Container>
   );
 };
 
diff --git a/src/providers/pond/deviceAPI.tsx b/src/providers/pond/deviceAPI.tsx
index a7c0352..8b778d5 100644
--- a/src/providers/pond/deviceAPI.tsx
+++ b/src/providers/pond/deviceAPI.tsx
@@ -700,8 +700,12 @@ export default function DeviceProvider(props: PropsWithChildren<Props>) {
   };
 
   const setTags = (id: number, tags: string[]) => {
+    const keys = getContextKeys()
+    const types = getContextTypes()
+    let url = "/devices/" + id + "/tags" + "?keys=" + keys + "&types=" + types
+    if (as && !keys.includes(as)) url += "&as=" + as
     return new Promise<AxiosResponse>((resolve, reject) => {
-      put(pondURL("/devices/" + id + "/tags"), { tags }).then(resp => {
+      put(pondURL(url), { tags }).then(resp => {
         return resolve(resp)
       }).catch(err => {
         return reject(err)
@@ -746,8 +750,12 @@ export default function DeviceProvider(props: PropsWithChildren<Props>) {
   };
 
   const untag = (id: number, tag: string) => {
+    const keys = getContextKeys()
+    const types = getContextTypes()
+    let url = "/devices/" + id + "/tags/" + tag + "?keys=" + keys + "&types=" + types
+    if (as && !keys.includes(as)) url += "&as=" + as
     return new Promise<AxiosResponse>((resolve, reject) => {
-      del(pondURL("/devices/" + id + "/tags/" + tag)).then(resp => {
+      del(pondURL(url)).then(resp => {
         return resolve(resp)
       }).catch(err => {
         return reject(err)
diff --git a/src/vite-env.d.ts b/src/vite-env.d.ts
index 11f02fe..db728ea 100644
--- a/src/vite-env.d.ts
+++ b/src/vite-env.d.ts
@@ -1 +1,4 @@
 /// <reference types="vite/client" />
+
+declare const __BUILD_DATE__: string
+declare const __GIT_HASH__: string
diff --git a/vite.config.ts b/vite.config.ts
index ed1b6f1..7ff8324 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -5,6 +5,7 @@ import { VitePWA } from 'vite-plugin-pwa';
 import * as path from 'path' // ✅ Import path module
 import { readFileSync, renameSync, existsSync, unlinkSync } from 'node:fs'
 import { fileURLToPath } from 'node:url'
+import { execSync } from 'node:child_process'
 
 const rootDir = path.dirname(fileURLToPath(import.meta.url))
 
@@ -49,7 +50,19 @@ function emitLocalnetShellAsIndexHtml (mode: string): Plugin {
 // https://vitejs.dev/config/
 export default defineConfig(({ command, mode }): UserConfig => {
   const useLocalnetShell = mode === LOCALNET_MODE
+
+  let gitHash = 'unknown'
+  try {
+    gitHash = execSync('git rev-parse --short HEAD').toString().trim()
+  } catch {}
+
+  const buildDate = new Date().toISOString()
+
   return {
+  define: {
+    __BUILD_DATE__: JSON.stringify(buildDate),
+    __GIT_HASH__: JSON.stringify(gitHash),
+  },
   plugins: [
     useLocalnetShellHtml(mode, command),
     emitLocalnetShellAsIndexHtml(mode),