Fixed the issue with keyboards with help and advice from Nebulox, Silver_Sokolova and Hubnester. Thanks, cheers and Большое спасибо.

Some....code from FU was found to be causing issues. I tried to force my way out of it, but on checking .behavior files, I realised that the problem was larger, much larger, than I had anticipated. You guys were right. I stopped modding .behavior files, and simply followed hubnester's advice to reinstate what had previously been removed.

The ear rape edition. Do not go near a piano, harpsichord or organ if you have sensitive eardrums.
We will replace this version ASAP!

This was an update I did not want to do, but it appears I have no choice.

Sayter's tinkering with NPC behaviour damaged NPC animations which trigger whenever they interact with keyboard instruments. Attempts to insert overriding files, ie vanilla ones, resulted in drastic issues (ie dying crew which could not respawn).

I've inserted some modified code to suppress the issue, but I do not know how extensive the damage will be. Organs and Pianos can be repaired, but Harpsichords might not. Still, any repairs to harpsichords would be mostily an issue of optics....mostly.