Merge branch 'stable-3.9' into stable-3.10

* stable-3.9:
  Update git submodules
  Update git submodules
  Make explicit the Gerrit support for Windows Server
  Fix mention chip

Change-Id: Ic63f5eb920453ff88c5c29482063c268661afec6
Release-Notes: skip
diff --git a/Documentation/config-gerrit.txt b/Documentation/config-gerrit.txt
index 9760a36..35a4173 100644
--- a/Documentation/config-gerrit.txt
+++ b/Documentation/config-gerrit.txt
@@ -4291,6 +4291,12 @@
 must have the DWORD value `allowtgtsessionkey` set to 1 and the account must not
 have local administrator privileges.
 
+**NOTE**: Windows is not recommended as a server-side platform for
+running Gerrit Code Review, because of the lack of adoption from the Gerrit Community,
+incomplete functional validation and lack of security testing. Gerrit on
+Windows Server is not actively supported even though it may still be
+fully or partially functioning as expected.
+
 [[ldap.useConnectionPooling]]ldap.useConnectionPooling::
 +
 _(Optional)_ Enable the LDAP connection pooling or not.
diff --git a/Documentation/config-gitweb.txt b/Documentation/config-gitweb.txt
index 00e33a3..1a8824a 100644
--- a/Documentation/config-gitweb.txt
+++ b/Documentation/config-gitweb.txt
@@ -211,6 +211,12 @@
 
 copy the contents of lib into `msysgit/lib/perl5/5.8.8` and overwrite existing files.
 
+**NOTE**: Windows is not recommended as a server-side platform for
+running Gerrit Code Review, because of the lack of adoption from the Gerrit Community,
+incomplete functional validation and lack of security testing. Gerrit on
+Windows Server is not actively supported even though it may still be
+fully or partially functioning as expected.
+
 ==== Enable Gitweb Integration
 
 To enable the external gitweb integration, set
diff --git a/Documentation/dev-bazel.txt b/Documentation/dev-bazel.txt
index fac71fb..5446c66 100644
--- a/Documentation/dev-bazel.txt
+++ b/Documentation/dev-bazel.txt
@@ -17,7 +17,7 @@
 
 To build Gerrit from source, you need:
 
-* A Linux or macOS system (Windows is not supported at this time)
+* A Linux or macOS system (Windows is not supported)
 * A JDK for Java 17 or Java 21
 * Python 3
 * link:https://github.com/nodesource/distributions/blob/master/README.md[Node.js (including npm),role=external,window=_blank]
diff --git a/Documentation/install.txt b/Documentation/install.txt
index 7733d52..1342818 100644
--- a/Documentation/install.txt
+++ b/Documentation/install.txt
@@ -178,6 +178,12 @@
         --StopClass=com.google.gerrit.launcher.GerritLauncher --StopMethod=daemonStop
 ====
 
+**NOTE**: Windows is not recommended as a server-side platform for
+running Gerrit Code Review, because of the lack of adoption from the Gerrit Community,
+incomplete functional validation and lack of security testing. Gerrit on
+Windows Server is not actively supported even though it may still be
+fully or partially functioning as expected.
+
 [[customize]]
 == Site Customization
 
diff --git a/polygerrit-ui/app/elements/shared/gr-account-label/gr-account-label.ts b/polygerrit-ui/app/elements/shared/gr-account-label/gr-account-label.ts
index 1db484c..6edf0fc53 100644
--- a/polygerrit-ui/app/elements/shared/gr-account-label/gr-account-label.ts
+++ b/polygerrit-ui/app/elements/shared/gr-account-label/gr-account-label.ts
@@ -205,7 +205,8 @@
     if (
       account &&
       account !== this.account &&
-      account._account_id === this.account._account_id
+      (!this.account._account_id ||
+        account._account_id === this.account._account_id)
     ) {
       this.account = {...account, ...this.account};
     }