Samsung Client causes always transcoding on the server

Server Version#:1.43.3.10828-720010828
Player Version#:5.94.1 for Samsung

I have a Synology DS118 and til I updated the Server everything was fine. In the Client DirectStram was mandatory, because my NAS is not capable of transcoding in realtime,

I saw this topic with the same problem but based on a windwos server:

It seems to me, that the solution in this case is removing check the speed and then do a transcoding on the PC. Well, on a Synology NAS this is no possible.

I deinstalled the Client, Reinstalled. Everything works fine with my two FireTV Sticks but not on the Samsung Samsung Neo QLED 4K QN85D 2024.

I must also say, that my Samsung made also a Software-Update, but my Samsung from 2018 has now the same problem and there was no update. It seems, that Samsung and DirectPlay is now broken in my case.

By the way, when I make DirectPlay mandatory, the error shown, that the format is not supported by the TV, which is not correct. I tried old movies that before worked.