It would help if we could see a video of this just to be sure. But it sounds like the shock/strut is weak allowing the wheel to bounce more then it should. However, if we see it we may be able to better assist because this could be way off.
I attached the process on how to replace a shock if this is what it is. Thanks
Images (Click to enlarge)
Tuesday, May 19th, 2020 AT 2:34 PM