fix: oneToOne call fails to connect when answered - WPB-21338 (#4021)

Author: KaterinaWire

WireAVS/Package.swift

@@ -17,8 +17,8 @@ let package = Package(
     targets: [
         .binaryTarget(
             name: "WireAVS",
-            url: "https://github.com/wireapp/wire-avs/releases/download/10.1.33/avs.xcframework.zip",
-            checksum: "acfdabb39cba9b98a481b43b2531c4e7ded8393178ffd2a6b3b1091b63bd1338"
+            url: "https://github.com/wireapp/wire-avs/releases/download/10.1.38/avs.xcframework.zip",
+            checksum: "d8dbd807728ff997bb101947bd7a4b4f4f2324badc5333501f7f2abc3239e69e"
         )
     ]
 )

wire-ios-sync-engine/Source/SessionManager/SessionManager+CallKitManagerDelegate.swift

@@ -74,13 +74,31 @@ extension SessionManager: CallKitManagerDelegate {
                 return completionHandler(.failure(ConversationLookupError.conversationDoesNotExist))
             }
 
+            await requestCallConfigIfNeeded(for: userSession)
             await userSession.processPendingCallEvents()
 
             WireLogger.calling.info("did process call events, returning conversation...")
             completionHandler(.success(conversation))
         }
     }
 
+    /// Proactively requests call config for a background session.
+    /// This ensures the session has fresh call configuration when handling incoming calls.
+    /// - Parameter session: The user session to request config for
+    private func requestCallConfigIfNeeded(for session: ZMUserSession) async {
+        guard session != activeUserSession else { return }
+
+        session.managedObjectContext.performGroupedBlock {
+            guard let callCenter = session.callCenter else {
+                WireLogger.calling.warn("Cannot request call config: callCenter not available")
+                return
+            }
+
+            WireLogger.calling.info("Proactively requesting call config for background session.")
+            callCenter.requestCallConfig()
+        }
+    }
+
     func endAllCalls() {
         for userSession in backgroundUserSessions.values {
             userSession.viewContext.perform {