Double click is necessary

If you launch minecraft by clicking play on the launcher for minecraft 1.14.4, the game does not register single clicks, and you must click twice in rapid succession in order to do what a single click would. This occurs some of the time, but other times it does not. After restarting the game it will sometimes happen again, sometimes not. Also, you have to do at least four clicks to cycle from fullscreen to windowed. I don't know why it only happens sometimes. It doesn't seem to depend on anything. Please fix it it is really annoying.