Game freeze and lags - WORKAROUND
i found this on Steam Discussion and it helped me with Lags and Game freeze (my system: Ryzen 3700x, 32GB RAM, Radeon 5700XT:
Lucifer69 
9. Apr. um 3:11 Uhr
"Possible 1.194 freeze/ crash fix
I can't take credit for the fix, but it definitely provides results for me.
Go to your library on steam and find the tools tab. Find space engineers - mod sdk and install it. It's a free dev tool that Keen released to everyone. Open its folder and then open Bin64_Profile. Copy VRage.Library.dll. Now open your space enineers folder and paste this .dll in its Bin64 folder. Click yes to replace the existing one.
The only issue seems to be periodic stutter, but I haven't noticed it on my R9 3900X and GTX 1080ti.
Edit: Do be aware that you'll need to replace this .dll file every time the game is updated (or at least each major update)."
Hope it help some others, too.
Ticket to technical support is opened.
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