Bug/Issue Changing Resolution

The game was running slow for something reason so I went to change the resolution to see if it would help. I clicked on the resolution bar and it instantly changed it to whatever number the mouse of hovering over. I figured it just wasn't designed well and had to hold my mouse then let go over the desired resolution, but when I tried that, again, it automatically changed the resolution after opening the list for 0.5 seconds. Something happened with the 2nd change and the game minimized and wouldn't stay open for more than 2 seconds. I had to exit and I lost the entire day I spent before this started.

Edit: I just found out the game lags after being minimized. When I restart it runs perfectly.