I have not seen this before. I have seen that KiCad’s resistors are a bit smaller, and thus you have to reconnect the wires, but that is a different issue.
In this other thread:
you mentioned a github link to “ondesModulaire” and I wanted to have a look at it to see how good eagle imports are at the moment, but I got a bit lost in all the different sub projects and many posted files.
Maybe eagle has different (official) ways of specifying part values. If so, then making a bug report for this may be a good idea.