Your assumption is right, CorailKit project does not depend on it. I just added CorailLib because it has a huge content and I wanted to know if the time spent to scan the content would delay somehow the boot process before loading the level itself. Maybe it has nothing to do with that, it was really a dumb test.
I was even wondering at some point if redirectors could be part of the problem and resaved all the actors of the level but it didn’t change the outcome.
It is important too to highlight the fact that this level is not new, it has always been in Unr, we use it as a showcase. It is just pretty unclear when this trouble occured…
For the time being, I will keep using the AdditionalPluginDirectories indeed.
Thank you again,
Philippe