java - JavaFX 8 screen rendering freezes when running with hw acceleration enabled -

one of our javafx 8 freezes quite when running on microsoft surface 3, every , when running on different tablet running windows 8 , once in blue moon when running on normal desktop.

if run prism.order=sw, doesn't freeze performance on tablets little bit slow usable.

when screen freezes, 1 can still click on screen , events , javafx thread appear working usual seems prism / quantum rendering or whatever converts scenegraph pixels crashed.

i've reported bug in old jira , new jbs , apparently need produce reproducible test case don't have time prepare.

any ideas why can happening? has had happening well? hints how root of problem?