Remote key stuck on lock - E91 w/Comfort Access

[thegreatestben 14]

Hello, did myself a google but most things that came up aren’t my issue.

Noticed the car was randomly locking itself repeatedly even when locked, could hear the actuators clicking.

With or without key really close by but within reasonable distance. After running through some tests I have deduced that my key is constantly on lock. The button feels fine, the key is in excellent physical shape, but I have to take the battery out, as soon as I put it back in car locks and continues to receive lock signal (mirrors fold in and windows roll up).

kind of relieved it’s only the key but potentially an expensive replacement. Has anyone had or seen this before? Would I have to open the key with a knife like the older diamond shape ones?

[thegreatestben 14]

Well to answer my own question, moisture ingress was the answer.

Green tracks across one side of the board. Cleaned it all up and put back together, problem solved.