Only once. But when the timers are synced all is ok. For my Timers, it can takes 6 crashes after they’re completely sync
I am also experiencing the same problem
It sounds as though something is crashing the app. I would need to see crash reports and have access to your timers to figure out the issue.
This article explains how to find crash reports on various systems. You will need to search for Seconds rather than the app they refer to in the article.