Can you list out what mods you installed? Someone here may have solved a similar problem with one.

Otherwise you may be better of going to Nexus and looking on the comment pages for those mods to see if you can find any clues, or asking on those mod comment pages.

One thing you might try first is uninstalling the mods completely, delete your config file & re-verify your Valheim installation through Steam... and then reinstalling the mods one by one and firing the game up in-between each mod install and testing your combat & stuff for a few minutes. That way you may at least be able to figure out which mod is causing the problem so you can look specifically at that Nexus page. And sometimes just doing that fixes issues like this.

Hope you find a solution, that sounds really frustrating