This has been explained over and over. Most ballot counters went home...and the poll watchers went with them. No one forced them to do that. No one told them to do that.
Ballot counting went on through the night because "COUNT THE BALLOTS" was the cry from people like you.
The contention is that they were actually told to go home because counting was stopped.
That matters. If the watchers are claiming that they were told the counting was done and yet the counting continued that is a major problem. Many of us, myself included, have been asking for some actual evidence of fraud this entire time. That, FINALLY, an inkling is posted yet so many reject it out of hand rather than calling for what actually needs to be done, a real investigation, just tells me that you are no different than the Trumpsters. No evidence would be good enough just like a total lack is good enough for many Trump supporters.
We need real accountability here as it is vitally important for the overall health of our elections.