Lately my games have been becoming more and more like that :

Usually it happens on Zone 3 or 4 of some certain maps ( usually on FC ) . When i enter the next zone either some pixels are missing and i can't progress any further ( can't pass the abyss even though some of my allies can ) , OR i see normaly the map but the enemies are missing ( they do hurt me though as i see my health drop on some certain points of the map .
On one of my previous PR FC runs i had this issue , but luckily i was using Elementalist and i was able to assist my team by using blindly ( by guessing ) aoe skills - barrier when needed . This happened on zone 4 and on the Dragon fight i was able to see only the dragon and not the dragonlings . Luckily i was able to finish the stage and was lucky on the dragon loot .
Does anyone experience anything similar ? Any known fix ? Was wondering if changing windowed mode or resolution fixes this , gonna try it next time it occurs to me .