Yes, the popup is showing even though another app is in the foreground/focused.
I’m not using the Cloud Sync. Diarium is in the background when this happens, not minimized.
I have not been able to discern a pattern to it. Most recently I was using Image Capture when it popped up, but I could be using any app. It’s as if some code is trying to execute in the background and it prompts the app to come to the surface in the form of that lone Touch ID window.
Trying to reproduce this over the past few hours, I occasionally unlocked the app a few times, minimized it, moved around the window, and eventually, a few hours in, the pop-up appeared while I was working in another app. If I keep Diarium in the background and don't quit it, this might occur 1-3 times a day; I'm not sure. I've been put off using the app so much because of this issue.
Thank you for looking into this!