The VON Chat do not work on server side. Nobody can hear others ingame. Also, this bug can be reproduced by installing a fresh version of the Arma 3 linux server from STEAMCMD Linux.
Moreover - the VON worked in 1.49 well. Since (i think) 1.50 it wont work at all.
Also the performance versions do not work. {F27330} {F27331}