if pickup up any tiers it returns to base game tiers. Mostly you have forgotten a code section name "return as bot name" MK 2-5 depending in tier.

NOTminable = {mining_time = 0.1, result = "construction-robot"},
this line of you code has to be:
but {mining_time = 0.1, result = "BRE-construction-robotics-mk3"}, for every tier

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Hey Sgamez,

Thanks a lot for pointing that out! I hadn’t realized the minable section was resetting all robots to the base game tier. I’ll go through each tier and update the result in minable to match the correct bot names (MK2 to MK5). Your help made finding this issue so much easier! 😊

Thanks again for the advice!

awesome you get it fixed.