Quad SDI UHD HDR 50P does not work (Sony BVM-HX310)

Hi,

I am not sure if Iam doing something wrong but it seems I can't get a proper UHD HDR signal in Premiere Pro. I am using PP2023 and a Sony BVM-HX310 with a Blackmagic Deckling 4K 12G in quad SDI. 

My sequence Settings: 

HD HDR 50p works fine, I get a proper HDR signal on my monitor. 

UHD HDR 25p also works, no problems at all

As soon as I try to use UHD HDR 50P I only get a SDR image on my Monitor. 

I tried the same in Davinci Resolve and it works without any issues. UHD HDR 50P works fine and the monitor instantly recognizes the signal.  

Is this a bug? What am I missing here? Does someone on here have the same issue? 

Thanks