Classic Raid Lockout / Mount farm

Hey,can somebody tell me if the Ulduar Lockout is still working?I cleared Ulduar on a Twink with Yogg still alive. Hearthed out -> opened a group -> invited my twink and entered the instance while the Char with the lockout had lead.​Still it didn't work and I got into the cleared instance from last week?​Anybody know whats the problem?Thanks! via /r/wow https://ift.tt/3na2zzw