diff --git a/shared/src/commonMain/kotlin/su/reya/coop/nostr/Signer.kt b/shared/src/commonMain/kotlin/su/reya/coop/nostr/Signer.kt
index 4872ac7..c3119fe 100644
--- a/shared/src/commonMain/kotlin/su/reya/coop/nostr/Signer.kt
+++ b/shared/src/commonMain/kotlin/su/reya/coop/nostr/Signer.kt
@@ -29,16 +29,14 @@ class UniversalSigner(initialSigner: AsyncNostrSigner) : AsyncNostrSigner {
     /**
      * Switch to a new signer.
      */
-    suspend fun switch(newSigner: AsyncNostrSigner) = mutex.withLock {
-        val pubkey = try {
-            withTimeoutOrNull(20.seconds) {
-                newSigner.getPublicKeyAsync()
-            }
-        } catch (e: Exception) {
-            throw IllegalStateException("Failed to get public key from signer", e)
+    suspend fun switch(newSigner: AsyncNostrSigner) {
+        val pubkey = withTimeoutOrNull(20.seconds) { newSigner.getPublicKeyAsync() }
+            ?: throw IllegalStateException("Failed to get public key from signer")
+
+        mutex.withLock {
+            signer = newSigner
+            _publicKeyFlow.value = pubkey
         }
-        signer = newSigner
-        _publicKeyFlow.value = pubkey
     }
 
     override suspend fun getPublicKeyAsync(): PublicKey? {
diff --git a/shared/src/commonMain/kotlin/su/reya/coop/viewmodel/ChatViewModel.kt b/shared/src/commonMain/kotlin/su/reya/coop/viewmodel/ChatViewModel.kt
index dda430a..b780371 100644
--- a/shared/src/commonMain/kotlin/su/reya/coop/viewmodel/ChatViewModel.kt
+++ b/shared/src/commonMain/kotlin/su/reya/coop/viewmodel/ChatViewModel.kt
@@ -1,6 +1,7 @@
 package su.reya.coop.viewmodel
 
 import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharingStarted
@@ -145,6 +146,8 @@ class ChatViewModel(
                 rooms.forEach { room -> newMap[room.id] = room }
                 currentState.copy(rooms = newMap)
             }
+        } catch (e: CancellationException) {
+            throw e
         } catch (e: Exception) {
             showError("Error: ${e.message}")
         }