I use your app for several years and I'm quite happy with it. Thanks for your efforts.
Last week I got a new Samsung S21 with Android 11. I use COL Reminder version 3.7.2.
Since then I can set a reminder but no alert comes if a reminder reached the set time (neither tone nor popup).
Only if I open the COL reminder app the alerts of the "expired" reminders will come (tone and popup).
It seems the app must run in the foreground to generate the alerts for set reminders.
I already uninstalled and newly installed the app but the problem remains.
For other apps like WhatsApp and mail the notifications are coming.
Any ideas ? Thanks in advance.