Hi,
me and a friend are playing on a multiplayer map (factorio v.0.17.79, the fat controller v.4.0.17 and some other mods) and we had several trains dismantled using construction robots. While the inventory is being emptied by the construction robots, we suddenly only had 2 UPS left. The debug menu shows this mod as the cause of script updates (see screenshot), we have already tested whether it works better in the single player but unfortunately the same result.
https://abload.de/img/fatpnkcv.png

Thanks for the report, should be fixed in the latest update for Factorio 0.17 and 0.18
I couldn't get my UPS to drop, but i think i got the mistake anyways. There where a lot of events generated every time a robot takes an item out of a wagon, causing FAT to do a lot of checks each tick.

Thx for the fast update.