and I accidentally deleted moms favorite list many times while experimenting and had to setup over and over which was headache and now I can do it freely as I can restore once I messed up.
have you test that channel on different device or app? if yes and still same issue then its channel/server related. did you report to your provider about it?
if no then I would test that too just to make sure but I believe its server/channel related.
you can also use team viewers to remote connect your box from your pc and transfer your recordings from your box to your pc.
once connected then from your pc remote connected to your box go to either
/storage/emulated/0/Android/media/buzzxr4000.tv/
/storage/emulated/0/Android/media/com.buzz.services.pvr/
and select your recordings and transfer to you pc.