When playing a multiplayer session as a guest, I cannot move after my character is knocked back.

All other inputs work correctly.  I can still aim, shoot, use actives, and check menus.  However, my character is rooted to the spot.

I could trigger this issue reliably by standing next to an explosive barrel.  Some enemy attacks that cause knockback triggered the issue as well, such as certain blobs.

Existing the session and rejoining temporarily resolves the issue.