My votemaps.txt includes the maps I want players to be able to vote on, and my config.txt is changed with ulx votemapMapmode 2.
Whenever the map is changed, the list of voteable maps are "flipped" so voteable becomes unvoteable and opposite. This only happen on my servers on a dedicated 64 bit linux machine, while everything works just fine on a separate vps with 64 bit linux too.
Both run the newest version from github. It happens on both a Deathrun and Alien: Isolation server (seperate files) and seemingly on whatever else I put up there.
I know this sounds ridiculous but I feel I've done everything I can think of, and nothing else on the server seems to have anything to do with votemaps (grep'ed related strings). Sorry for rambling but this is driving me crazy.