I really don't know whether I need to present myself because I found nothing about it. Anyway, It's been about one month since the problem I'm facing first occurred. To be specific, I tried two things:
I started the Resilio sync client in daemon mode, then I monitored resource consumption and I noticed it occurred while it was adding event listeners to each file.
Then, I decided to try updating the client and reinstalling (I just downloaded the archive from the site and re-extracted). By adding one folder at a time, I noticed that when I added a really big folder (in terms of number of files) the problem reoccurred.
I hope to get some help and I'm ready to provide all kind of debug information.
Thanks in advance,