This is still an issue causing random zooms and hard to get back to a proper view. A lot of improvements lately, but this is an issue in every.single.game. Implementing view/zoom keyboard shortcut could help, but sensitivity adjustment would be even better.
I've stopped using the game in a browser due to the many issues that happened. I'm now playing via the Steam client. There are many technical reasons that this could work better for you but since I'm not a member of the Admin staff here and have never seen their game code, I can't verify that this will solve your problem.
But I'd recommend the Steam route. It's worked better for me.