After attempting to place a controller for the first time (went straight to gold one), the game suffers CTTD and outputs message
"Invalid block entity storageracks:controller // com.ldtteam.storageracks.tileentities.TileEntityController state at BlockPos{x=-2371, y=63, z=-1026}, got Block{storageracks:gold_controller}[facing=south]"

I am playing with MineColonies Official modpack ver 1.21-1.0 with no changes done to it.

Has been fixed in the newer version with the updated pack as well =)