You cannot analyze it at all. You can only be yourself. They make no sense. In my sitch, if my W feels like she is falling back into any sort of "comfortable zone" with me, she finds some way to try to pick a fight, antagonize or just becomes the cold and distant person you said your H is today.
It is not pleasant. I can tell you that their roller coaster is real. Do not board the ride! Be a lighthouse bystander. Detach. Validate when approached. Do not pursue. GAL and do your own thing!
JMHO.
M51 W44 T21 M18 D14 S11 BD date 9/17 W filed 02/18 W withdrew petition following week In house separation 03/18 In Limbo and DB'ing since 03/18 W is moving out by mid Nov 2018 A drawing up paperwork 11/18