Naenia Varinius.9457

Anyone ever find a solution to this? My partner just started playing and it's weird - I've never had this issue myself but it happens frequently though randomly to him (even in cities with no combat), and when I logged onto his account on my computer it happened so it's not hardware. Logging out to character select seems to fix it but nothing else does on either of our computers. Any help? This is making playing incredibly frustrating for him. Thank you!