Micro stutter Issue HELP!

hi
the game was running fine before had no problem, after the latest updates i joined official server ‘frankfurt 1’ where i have used to play after 10 sec the game start to freeze ( micro stuttering) i tried like 2 other official server same thing, i went to community server ( rustopia) everything work fine here no issues. what is the fix pls?
my pc rig :
R9 280X 3GB OC
i5 3570k OC
8GB RAM 1600MHZ
W10