I use 1.8.9 or 1.12 Optifine with Java 64 bit( i just reset my pc and put 64 bit java) .It's similar do that problem, i had that also few month ago but i solved using old launcher but now cause the problem too...
If I have normal fullscreen and I press F11, screen goes to white small screen, then I press F11, it goes to full black screen.
It lags little, when I press F11.
It doesn't happen when i am in options before go in server or when i go in server for first seconds i can press F11
I saw that but i don't understand how he corrected: https://bugs.mojang.com/browse/MC-98915?attachmentOrder=asc