Brightness Issue

Hey has anyone else had this issue with Beta 2 where their brightness seems to be stuck on just half even when the on screen picks up the brightness being changed... I can’t seem to be able to turn brightness up at all and all since beta 2? Any ideas what but it might be so I know where I’m looking so can submit the report to Apple so nobody else gets it... Running 15inch mid 2010 MBP 1tb SSD and 8GB Ram