"client info is null" - WAM broker returns token without client_info (json_parse_failed)


 - Version: 0.4.1.19742
 - MSAL version: 4.83.1.0 / MsalRuntime 0.20.3
 - OS: Windows
  10.0.26200, AzureAD joined
 - Key trace lines: WAM silent auth succeeds → client_info is null on second token acquisition → json_parse_failed
 - Repro: workiq logout → delete msal_token_cache.dat → workiq ask -q "test" → first token OK, second call fails