One common issue that gives the identical problem is using FMJ Calipers on the earlier A/B/E style stands.
The bleed screws end up oriented so that there is always an air pocket in the caliper.
I chased this very problem for weeks . I finally asked my buddy Kevin (freakin mopar savant!) to look at them. Took him all of 30 seconds ! You have your calipers on wrong...