5732x1080 Resolution Problems I Have Noticed

So I have played league since late season 4, and have always had 3 monitors, but only used one for playing the game. I never thought to try league on all 3 until just 2 days ago. I set it up, played it in game and I liked it. The resolution is** 5732x1080** (normally one monitor is 1920x1080). After Playing the first game, without any issues (besides wishing i could make the mini-map show on the center monitor instead of the far right, but that's bedsides the point). The second game i played i noticed took me an extremely long time to load in compared to normal. Normal for me is 25 ping, 130-160 fps, as I have a good computer and pay for fast internet. After I loaded in, the frame rate was choppy around 25 fps, so i changed the resolution to 1920x1080, and then back again to 5732x1080 and everything went back to being smooth. After this game, it seemed that I would have to do that every time , as the problem continued, however it then began to make me load in 5 minutes late of the start of a match. this is when it started to get annoying. I am writing here because I was unable to load in an entire match, at the end of which my teammates asked to report me(which i understand, being as they don't know what was happening with me). My hope with this post is that it will add to awareness, and RIOT will see this somehow, and hopefully find out how to fix what I assume is a bug.