Just looked it cuz I was curious where the break was and whether it matched my impression when watching it.

From the Wikipedia: en.wikipedia.org/…/Battlestar_Galactica_(2004_TV_… it seems that the strike interrupted the production of season 4 but not 3.

Which matches my experience. I was with the show up to the end of S3 but then S4 felt meh-ish except for

spoiler

the Gaeta coup episodes