diff --git a/vector/src/main/java/im/vector/app/features/spaces/SpaceSummaryController.kt b/vector/src/main/java/im/vector/app/features/spaces/SpaceSummaryController.kt
index a334548cfc..3d628fbaa4 100644
--- a/vector/src/main/java/im/vector/app/features/spaces/SpaceSummaryController.kt
+++ b/vector/src/main/java/im/vector/app/features/spaces/SpaceSummaryController.kt
@@ -170,7 +170,7 @@ class SpaceSummaryController @Inject constructor(
                     if (hasChildren && expanded) {
                         // it's expanded
                         subSpaces?.forEach { child ->
-                            buildSubSpace(summaries, expandedStates, selected, child, 1, 3)
+                            buildSubSpace(groupSummary.roomId, summaries, expandedStates, selected, child, 1, 3)
                         }
                     }
                 }
@@ -181,7 +181,8 @@ class SpaceSummaryController @Inject constructor(
         }
     }
 
-    private fun buildSubSpace(summaries: List<RoomSummary>?,
+    private fun buildSubSpace(idPrefix: String,
+                              summaries: List<RoomSummary>?,
                               expandedStates: Map<String, Boolean>,
                               selected: RoomGroupingMethod,
                               info: SpaceChildInfo, currentDepth: Int, maxDepth: Int) {
@@ -195,9 +196,11 @@ class SpaceSummaryController @Inject constructor(
         val expanded = expandedStates[childSummary.roomId] == true
         val isSelected = selected is RoomGroupingMethod.BySpace && childSummary.roomId == selected.space()?.roomId
 
+        val id = "$idPrefix:${childSummary.roomId}"
+
         subSpaceSummaryItem {
             avatarRenderer(host.avatarRenderer)
-            id(childSummary.roomId)
+            id(id)
             hasChildren(!subSpaces.isNullOrEmpty())
             selected(isSelected)
             expanded(expanded)
@@ -216,7 +219,7 @@ class SpaceSummaryController @Inject constructor(
 
         if (expanded) {
             subSpaces?.forEach {
-                buildSubSpace(summaries, expandedStates, selected, it, currentDepth + 1, maxDepth)
+                buildSubSpace(id, summaries, expandedStates, selected, it, currentDepth + 1, maxDepth)
             }
         }
     }