more than 10k the search range costs too much for the pathfinder and enemy-finder program.
It's fairly arbitrary, but i'd rather make you move the deployment bases forward to the enemy nests than have your game drop from 60 FPS to 30 FPS and have everyone complain.
The search radius should be from the assembler, not the centre of the squads. Maybe there's a glitch in the assembler centerpoint? IF you can, go into the mod folders, unzip the Robot Army mod into its folder, and delete the .zip file. Navigate into the mod folder, then in to the config folder. Open up the config.lua file, and find the "GLOBAL_TARGETING_TYPE" to = 1.
Then start up your save game and see if they start working properly again. Thanks!