Hi, I sometimes get this error. I don't user time shift.

Set timeshift buffer >=200mbytes

thank you. i also have this problem with 300 mbytes

Please send me logs. Set Options->Debug->Logs

For me editing the ProgDVBEngine.ini helped. BufferSize=256
I even was not using time shifting and got this messages. I guess it's mostly pvovocated to happen, when the same DS-decoder (or renderer?) used with ProgDVB is also busy in other software players.

I only have that Problem if the signal quality is temporarily bad.

Yes, it is possible. Graph can crash on bad signal. You can try change demux and video codec at first. For more stability...