Hi there!
I just had a quick session with timers on Figjam, and while the timer is running, using the +1 minute feature adds a minute to the total of the timer and not the remaining time.
E.g. I started a 10 minute timer, when reaching the end (about a minute left) I added an additional minute, and that reset the timer all the way to 11 minutes, making us lose the actual remaining time we had.
I think it’d be really useful if the timer minute increase adds a minute to the remaining time rather than the original total!