Still get Avatar freezes and jumping all over. Anyone found anything that helps

I thought it had gone away for a while, but lately I am seeing it again, but then again I am also on ZWIFT more now that the weather is changing. My Avatar will look fine to me, except for an occassional lock up where I then have to catch back up to the group, but others say it keeps jumping around like a stunt bike or drunken rider. Anyone ever find a permanent solution to this issue. Like I said, I don’t see it but others do.

That sounds like an internet connection issue, either with your wifi, between you and your ISP, or somewhere upstream of that. Zwift is clearly having trouble on its servers with working out exactly where your avatar is at any moment.