When placing a Digital Miner Next to a configured tesseract from Thermal Expansion, the client crashes.
After reloging there is a fake miner in the inventory and the miner is on the ground, when removing with a crescent hammer before removing the tesseract, the miner is placed in the inventory and still on the ground. tested this a couple of times and i'm left with 5 digital miners while only building 1. they are all functional only the inventory of the duped once are empty and the upgrades are not coppied either.

AFAIK currently when a power source ( as in connected directly to the Digital Miner) is placed before the Digital Miner it'll just kick you out and once you get back in it'll have a copy laying on the ground and one in your inventory.

This is from what I have experienced using TPPI(1.6.4) version of Mek.

This has been fixed :)