Could also be that the Roku's 1 channel limit is maxed out. Keep in mind the old Rokus did have a limit on how many Channels could be installed at a time (based on their size).
In those situations, when entering/exiting the Channel Store following a channel being added, doesn't the Roku 1 display a message that it's out of memory (or too many channels or something)? Or is that only for Channel Store channels?
Roku Ultra (4660), Roku 2 (4210), Roku Stick (3600)
Apple TV (4th gen), Fire TV, TiVo, Chromecast
Roku first, second, & third generation boxes.
Apple TV (2nd, 3rd gen)