this happened to me before 3 times but it reappened after the last patch
Were you trying to use binoculars?
This has affected me for a long time, mainly BMP-3 transitioning from binocular to gunner sight, I will get random black screen for a split seconds, but the binocular frame still there just can’t see shit
It’s a old glitch, unsure if Gaijin ever bothered fixing it.