After removing a channel, best practice is to clear the Roku's memory by restarting it before reinstalling the channel. Did you do this? Without the restart you may not get a clean reinstall.
Restart via Settings > System > System restart (for Roku TVs: Settings > System > Power > System restart)
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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Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X
