So as the title said after updating the project to 5.2 the characters start to show strange wriggle on the mesh and even in the eyes to open and close very fast. Do you have any idea why this is happening 
I already have auto setup plugin for 5.2 installed and I did not figure how to fix this issue and I don't want to re-import everything and start from Zero :(

at least give me a link that i can follow to fix this issue

Would be helpful if you show us a video of what exactly is happening...

Toystorylab on Vimeo :     Crassitudes (my "Alter Ego") on Youtube: 

here is what happening to the mesh and this just happens after updating the project from UE5.1 to UE5.2