Timeout duration is not often respected.
Annotations and rule 10.5 say that you can call a delay of the Game and check the disc in, but it is whether unclear, unknown or not applied, maybe a bit rough.
I would suggest to apply a 10-15s pre-stall possible after the end of the timeout, but then call a violation to ensure only 7 players are on the field and that they are aware of the stall starting again.
#stopthe2mintimouts