Stealth does not work when being off screen
If you or another player are in stealth and you become 'on screen' to each other then the other person can see the person in stealth. Going into stealth while already 'on screen' appears to work fine.
It seems that it is based on a certain distance, as just going 'off screen' does not make the other person become visible.
@SuperMickyJay Haha, i guess you both should have talked who of you make the report
@Kralith We were aware, more likely to get noticed if there is more than one
I already posted about lots of stealth bugs about 4 days ago