I did my dips for awhile with bodyweight, then stopped for a bit.
I started up doing dips again, but since I've gotten stronger I started attaching some weight and have been doing this for about....1 month...so fairly recently started doing them weighted vs. only bodyweight.
I do them for chest, I lean forward and dip really low to get a full stretch. I was thinking it might be due to starting recently with weighted dips vs. bodyweight, but I wasn't sure.