After a ride yesterday I noticed that after any form of compression, my O2 shock “clunks” back to full extension. The pressure in the shock hasn’t changed.

I’ve no idea what’s causing it, and am happy to a air can service (It’s not had one since “new” but it’s not been ridden the 50 hour service interval yet) but I’m not sure if that’ll fix the problem? Any ideas what could be up with it?

Cheers!