Timer Series continues to run after completing workout

when using "weights" mode I notice my timer continues to run after completing a workout.

It's not clear for how long has it been running: 27 days and 4 hours? It seems this is also creating problems when I go running or cycling as the stats shown on each lap are rare, I don't know how to explain, but suddenly the stats are just different from the ones I'm used to seeing. I'm a regular runner, so I know and expect certain numbers on my trainings.

Anyone knows how I can restart the timer/countdown of the series?

Thanks in advance