@JWS I took a quick look at the GitHub page and see that line you quoted. Unfortunately, I'm not well versed in code to decipher much from that alone but it leads me to ask.... When you are entering the vessel after EVA are you entering into a command pod or what part exactly? Is it a stock part? Just asking because KH seems to be looking for a vessel part and then applying that information to the Kerbal upon re-entry from EVA. It sounds like everything is fine before EVA so I'm not sure this is even the right direction to troubleshoot this issue. But it looks like you sorted out the issue with LGG in the Fusebox Continued thread. Good job, btw!