Like @Seapup and @bam said the latest update v.2.10.80 should have fixed the issued with the band background process notification. I noticed the latest app has removed the DownChannelService notification. However, I have the wyze band so I still get the notification. @seapup do you still see the DownChannelService notification on v2.10.80?
If the latest app did not fix it, then you may need to submit a log and repond to the thread.