stuttering while using restock and restock+ only when staging

[xsaero]

Hello,

I "tuned" my KSP and I'm very happy of the result. I have parallax and I installed the true volumetric clouds from blackrack that's all for the environmental mods, on top of that I installed waterfall and real plume + planet shine for the spacecraft and I'm happy, it's fluid and the rendering is just amazing... I have even smoke without lag when lifting off so it's perfect.

Later I installed restock and restock+ to have a better visual of the spacecraft and stockalike Station Parts Extansion Redux, all with Ckan (except the basic installation following blackrack guidance).

When I have a basic rocket with 2 stages it's fine, but when I have a more complex rocket with 4 boosters, 3 stages and more, when I stage a decoupling sequence, I have a micro freeze of half a second without reason.
I uninstalled the restock and restock+ mods and used the exact same rocket with the vanilla part, I don't have any micro freeze, I even added the mods to have explosion effects while decoupling and it's completely fine.

I don't understand what's happening with restock mods, do you know where it could come from and how to fix it?

SSD, 32 GB RAM, RTX 3070, i7-10750H

Thank you