Thanks for your answer. I started a whole new project in 4.20, there is nothing I took from the previous version. I compared the settings of the “old” and new BPs, they are absolutely the same.
Am I the only one not able to get a projectile to bounce?
Edit : Nevermind, I found the issue, my static mesh was not the root of my BP and, therefore, the projectile was not working as expected. Sorry for the mess 