[bbcaddict]

Never heard about this kind of problems. Without a log we cannot say/fix anything.

And there is a setting for "Confirm channel switch with ok". 

I knew about that setting, I didn't touch it while upgrading from 17 to 18, however revising it I saw it was enabled. Anyway, as I said, that's ok (but now I unchecked it).

What's not ok are the missing guide (though this time it was present)/info icons and the fact that after switching channel the new stream isn't treated as a pvr channel (i.e. no channels/info/guide icons).
The log is here https://paste.kodi.tv/ekamunaved.kodi

I selected a channel and did a channel up, I stopped the playback and repeated.