Hi, thanks for looking into this!
I haven’t changed my timezone or anything of the sort. Just to test out if it’s an isolated issue, I’ve tried to replicate it on another section of the same test. It happened again, and the timer is still running in the background. I’m tempted to try it on a different test now, just to see what happens ^^’’
But I still have no clue what could be causing it (especially since I haven’t seen anyone else report this?). I know I had some weird bugs going on for me a few years ago where my reviews seemed to have an endless due-date (iirc they were showing as due in 2-3 years on my profile despite being at a low srs), the report went unresolved though, and I ended up manually mastering them since they were stuck in limbo for too long. All to say, this current issue seems similar in a way? Both are time related… Maybe my account is haunted 
Let me know if I can check/try anything out on my end for you!
order type question in grammar/reading add the correct sentence structure in the review section so you’re not left guessing what the entire sentence would look like.