escape>settings>gameplay>hide polymorph helmet>turn it ON. If its already on, turn it off then on again.
worked for me. enjoy.
(thanks Fengrush, heard it from him)
yeah i cannot play right while this bug occurs. the regular old "Hide Helmet" will fix this, which i have it quick slotted anyway. it takes 5 seconds to toggle it and fix your "surfing weapons" bug thankfully.
still doesnt excuse zos from not fixing this though