Some problems with casteble wax resin

Hello, i faced with some problems with csteble wax resin from formlabs. I have printed
bridge of 6 teeth and it`s looks like have been shrank. After cast, one by one is fitted, but whole construction is not landed, and look like compressed. Does any body knows why it happend. Can it be
shrinkage of material and how i can avoid this? And the last one: does castbele wax need
flash exposure after printing
P.s. Sorry for my English it is not werry well)

If printed farme fitted on model before casting problem for 100% is in the investment material expantion side or/and heating before cast

problems were after printing

Tray Adentavest CB investment & speed burn .