diff --git a/bootstrap/helpers/shared.php b/bootstrap/helpers/shared.php
index 4bb989de4..08af8ee42 100644
--- a/bootstrap/helpers/shared.php
+++ b/bootstrap/helpers/shared.php
@@ -353,14 +353,30 @@ function showBoarding(): bool
 function refreshSession(?Team $team = null): void
 {
     if (! $team) {
-        if (Auth::user()->currentTeam()) {
-            $team = Team::find(Auth::user()->currentTeam()->id);
-        } else {
-            $team = User::find(Auth::id())->teams->first();
+        $currentTeam = Auth::user()->currentTeam();
+        if ($currentTeam) {
+            // currentTeam() can resolve a stale (just-deleted) team from the
+            // session/cache, so Team::find() may still return null here.
+            $team = Team::find($currentTeam->id);
+        }
+        if (! $team) {
+            // Fall back to any team the user still belongs to.
+            $team = User::query()->find(Auth::id())?->teams()->first();
         }
     }
+
     // Clear old cache key format for backwards compatibility
     Cache::forget('team:'.Auth::id());
+
+    if (! $team) {
+        // The user has no team left (e.g. just deleted their current team and
+        // belongs to no other): clear the stale session reference instead of
+        // dereferencing null.
+        session()->forget('currentTeam');
+
+        return;
+    }
+
     // Use new cache key format that includes team ID
     Cache::forget('user:'.Auth::id().':team:'.$team->id);
     Cache::remember('user:'.Auth::id().':team:'.$team->id, 3600, function () use ($team) {