i had these problems with my RX Vega 64 and now with my new RX 5700 XT.
I tried to clean install all GPU Driver and reinstall my Windows it's not working.
Game is always crashing after 10min-1hour.
I've noticed that it's crashing faster whenever i try to overclock my card.
It meight be just me but i'm not even high overclocks.
It's frustrating and makes the game unplayable, specially when playing ranked matches.
I've got the same problem with the RX 570 and i've done the same things, nothing works. Meanwhile i'm playing batman arkham knight and for honor at extreme settings with zero problems and zero frame rate drop at 60+ fps.
For apex i've also tried to remove and reinstall the vc_redist versions and the director X.
I've done a test on the ram and on the HDD integrity. Zero problems.
Hopefully this gets fixed cause im Buying a new pc with
Ryzen 9 3900X
RX 5700 ROG 8GB
SO please reply when there is a fix so i know cause im gnna get that pc