diff --git a/packages/hub-ui/src/client/components/dock/Dock.vue b/packages/hub-ui/src/client/components/dock/Dock.vue
index 9545a95e..61d3f9bc 100644
--- a/packages/hub-ui/src/client/components/dock/Dock.vue
+++ b/packages/hub-ui/src/client/components/dock/Dock.vue
@@ -6,7 +6,7 @@ import { useEventListener, useScreenSafeArea, whenever } from '@vueuse/core'
 import { computed, onMounted, reactive, ref, useTemplateRef } from 'vue'
 import { BUILTIN_ENTRY_CLIENT_AUTH_NOTICE } from '../../constants'
 import { docksSplitGroupsWithCapacity } from '../../state/dock-settings'
-import { setDocksOverflowPanel } from '../../state/floating-tooltip'
+import { setDocksOverflowPanel, useDocksGroupPanel } from '../../state/floating-tooltip'
 import { useIsRpcTrusted } from '../../utils/useIsRpcTrusted'
 import BrandMark from '../icons/BrandMark.vue'
 import {
@@ -175,9 +175,15 @@ function bringUp() {
 
 const isHidden = computed(() => false)
 
+// An open group menu popover anchors to a dock-bar button — collapsing the rail
+// out from under it would leave the menu floating, detached from its trigger.
+const docksGroupPanel = useDocksGroupPanel()
+
 const isMinimized = computed(() => {
   if (context.panel.store.inactiveTimeout < 0)
     return false
+  if (docksGroupPanel.value)
+    return false
   if (context.panel.store.inactiveTimeout === 0)
     return true
   // @ts-expect-error compatibility
diff --git a/packages/hub-ui/src/client/components/dock/DockEdge.vue b/packages/hub-ui/src/client/components/dock/DockEdge.vue
index 169b0fb8..de354a4e 100644
--- a/packages/hub-ui/src/client/components/dock/DockEdge.vue
+++ b/packages/hub-ui/src/client/components/dock/DockEdge.vue
@@ -7,7 +7,7 @@ import { useEventListener } from '@vueuse/core'
 import { computed, h, onMounted, ref, useTemplateRef } from 'vue'
 import { getEntryGroup } from '../../state/dock-settings'
 import { sharedStateToRef } from '../../state/docks'
-import { setEdgePositionDropdown, setFloatingTooltip, useEdgePositionDropdown } from '../../state/floating-tooltip'
+import { setEdgePositionDropdown, setFloatingTooltip, useDocksGroupPanel, useEdgePositionDropdown } from '../../state/floating-tooltip'
 import { useIframePanes } from '../../utils/useIframePanes'
 import BrandMark from '../icons/BrandMark.vue'
 import ViewEntry from '../views/ViewEntry.vue'
@@ -60,6 +60,10 @@ function bringUp() {
   }, +store.inactiveTimeout || 0)
 }
 
+// An open group menu popover anchors to a toolbar button — collapsing the
+// toolbar out from under it would leave the menu floating, detached from it.
+const docksGroupPanel = useDocksGroupPanel()
+
 const isCollapsed = computed(() => {
   if (!settings.value.autoCollapseEdgeToolbar)
     return false
@@ -67,6 +71,8 @@ const isCollapsed = computed(() => {
     return false
   if (context.panel.isDragging)
     return false
+  if (docksGroupPanel.value)
+    return false
   if (hasPanelContent.value)
     return false
   if (store.inactiveTimeout === 0)