I did some searching and all I found is https://forum.goodtaskapp.com/t/reminders-keep-popping-up/508 which is similar but not exactly my issue.
I am using macOS 10.13.6 and GoodTask 5.4.2 (584) (from Setapp). When I get a notification and other windows are covering GoodTask, if I click Snooze, then the GoodTask window always comes to the front, which is not what I would expect.
Is there a setting I am missing to prevent this from happening? Is this a 10.13 bug?