I have a few reminders set in the app, and they often trigger at the same time.
If there are two habits in the main OS notification screen and I press “complete” on the second on, it will actually complete the first in the row. I haven’t tried with 3 or more, but I believe its index or some id mismatch on closing. Can you check that out?
App Version: 6.1.0
Btw, the app looks beautiful!