This might be the result of changes made in Roku operating software version 11.5, which is slowly rolling out.
Settings > System > About will show you what Roku software version you're running.
I don't have 11.5 yet on any of my devices, but Roku's announcement of 11.5 touts "an all-new content discovery experience".
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
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Ultra 4800 | Streaming Stick 4K+ 3821 | TCL Roku TV 43S245/C107X