No. I am the only user. I have Roku on 3 TVs in my apartment and in my office at work. I have gone to the trouble of doing system restarts and resetting the location of Acorn on all of the devices to the top. Every day, invariably, it drops to the bottom after what looks like some refresh of Roku. None of the other applications I have move (except to replace the hole that Acorn left when it went to the bottom). Everything else stays in place. I don't get it. This started when I dropped Acorn TV through ROKU due to the Ads and shows missing and went straight to Acorn TV for subscription.
I've had Acorn (subscribed directly with Acorn) on all 3 of my Roku installations for at least 3 years but I've never seen this happen. We pay annually to get a reduced rate, but that seems unlikely to affect this.
I don't expect this to help, but the only thing I can think of for you to try is signing out of your Acorn account then signing back in. On Acorn's home screen press the * key on your Roku remote then click on "Sign out". Now repeat and click "Already a subscriber? Log in" and sign in with your Acorn credentials.
Meanwhile you can easily go straight to the bottom of the Roku home page channel grid by scrolling UP.
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. If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
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