1) Have TrackIR 5 connected. Notice the TrackIR 5 device lights are active.
2) Start the game, first starting Steam and then starting arma3.exe, and log into a multiplayer game server
3) Notice TrackIR is deactivated (including LED light) just prior to entering the multiplayer 3D world. To workaround, open Game Configure Controller settings for automatically having the game require the TrackIR hardware and the TrackIR device should just immediately start working.