Hi support,
Did you get a chance to look into the above video and find out the cause and fix of the issue?

Interesting, I see it on Safari Version 13.1

I tried to capture the shaking, it is not very visible, but if you focus you will notice it,

https://drive.google.com/open?id=1WT4SjMpq_wte0Lkuq0KG4yXgGyFce4zt