Basj,
New version does the same thing. As soon as I plugged in an external HDMI monitor all the fences moved to the left and some ended on top of each other. Unplugged monitor and restarted LT and Fences stayed all jumbled up to the left and overlaid.
Moved fences to back where they were and powered down system. Powered system back up All fences stayed where they were moved.
Plugged HDMI monitor back in and fences showed in correct position on external monitor.
Powered down LT and monitor and brought both back up at the same time and the fences stayed in their correct position on the LT screen and the external monitor.
Maybe something to do with reading the monitor info from the system, as it was odd it failed the first time but worked correctly after all devices were powered off then on.