this morning while playing, I was clicking on a factory rebuilding some ships (I was hosting game) during that time my Cap ship Max went to -1 and my fleet capacity went to about 30.
It took me over 30 min to unravel what was going on. I did not figure out how it happened but the solution to ending it was to remove a cap ship from production. But why did this happen in the first place?
also I am reasonably certain, but not 100% that research was also halted during this time.
I only noticed the research as the fact that when I figured out how to get the ships building again that I was way behind everyone else in research.