Well Well Well.

I have had this issue for a while and now someone else has spotted it , so it seems isnt my mouse thats at fault after all.

Along with this, scrolling is a problem,and the random popping up of messages as you try to,some of which you cannot actually do,like move location, because you are already marching.

Hi! Try to use another browser, ms edge is awful browser. I play in Vikings via Google Chrome or Mozilla Firefox and never saw that bug. Also it mb cache problem. 

Here was official post about cache and another problems https://plarium.com/forum/en/vikings-war-of-clans/technical-questions/106959_what-does-the-game-need-to-work-correctly-/

Hello Jarls! 

This kind of failure happens in case your PC cannot load the application data due to the lack of RAM or unstable Internet connection. Please try closing all not used applications and tabs in your browser before launching the game. Please also check your PC's RAM and make sure your Internet connection is stable. If the issue is still relevant after performing the specified steps, please let us know.