While AI has seen slow improvements to mining, this bug absolutely cripples mining drone carriers as every time a rail-swap is performed on a rail that connects to cargo, the cargo link is lost. Doesnt matter how it was done within my ship (Even adding the master rails to the cargo pull int he hope the link data was being copied/overwritten) the cargo pull did not survive the drone launch/recollection phase as the rails would change, then lose their data.
Ive noticed a lot of spontaneous loss of linking recently as well, with rails no longer appearing as connected, but apparently operating as expected.
Ship BP/sment can be supplied upon request