I’ve had the same too and went into triage and was told everything was ok. It could be pattern. I was told that sometimes there isn’t a reason, they just change their movement patterns
You’ve done the right thing, keep going to triage if you need to!
I’ve had the same, and been to get checked as well- think with us it’s because I have an anterior placenta which sits more to the right so baby went and explored over there and I didn’t feel all their wriggles