[Gameplay] Mouse icon disappears in ranked games

I've reported this earlier in the week, but whenever I play ranked games near the mid game point my mouse cursor disappears. This doesn't happen in normals but continues to happen whenever I play ranked. One moment everything is fine then all of a sudden my mouse icon disappears. I can still click and if I hover over where my mouse "should be" I can see that something will light up i.e. the store button that has my gold will light up but I cant see my mouse. This has contributed to me losing a few ranked games so its extremely frustrating. Please help me fix this. Thank you.