Try using a t34 85 that's the vehicle that it happens to me the most in. And sometimes I look back look forward and Bam no trees for 3 or 4 sec. It gets anoying when trying to hide.... Also happenes to m3s , but in them can last up to a minute. It almost cost our m3 driver's life when he was trying to hide and in the middle of trying to find a spot .... The trees disappeared on his end.we had to manually guied him to a spot. (Bec we could see trees ... He couldn't. )