I have a problem using timeshift function for mentioned protocol.
ProgDVB works fine, I've copied my list settings from ProgDVB to ProgTV UWP and I get 'Channel format not supported' error when I try to use the timeshift function in UWP version.

Can you please check the functionality?

Current version of ProgTV UWP not use my Engine. I hope final port it in this year. Watch for updates

About "Channel format not supported" - some providers allow more one format of channel. You can check in control panel of provider.

PC or xbox? You can use WPF version for PC

Using it on PC, for other formats of timeshift - I've already tried them both on ProgDVB and ProgTV.. Only xtream codes on ProgDVB works.
The reason I'd like to migrate from ProgDVB network edition is that I have a lot of problems with it..

When using timeshift: timer is just freezed but the video is going.. => problem when skipping video (ads) where when I press skip on remote the program skips from the time where it's been frozen..
When switching monitor modes (from single to multiple monitors and vice-versa) the video just stops, audio still plays..
Same happens when uac is called.

So that's why I wanted to try something 'more native' for OS.. how to try wpf version?
And thanks for fast response!

ProgTV from ProgDVB installer is WPF version.
But timeshift stability not depended from UI. You can try select other demux or/and codecs.