invisible cursor

i have just played a ranked and when the game started i somehow managed to flash into the wall and when i looked it turned out my cursor was on flash because the description had camae up but i had no cursor there so then when i went to lane as to play adc i couldn't even get 10minion kills in about 10 minuets so as you guessed i fed a bit then the annoying thing happened
my team started to flame that i fed (which i didst mind at the time)so i said i couldnt play properly and that i have an invis cursor so then they flame more so i try again but keep feeding so then i decided it would be better for me to just stay in base and try to get used to it but then they started flaming that i afk even if i get an amazing ulti or something like that (they even called me a ks when i saved 2 of them and got a kill) so the cycle kept going round and round untill the game ended plz find a way to stop this it has happened to my friend aswell and he got a rankd ban thing from all of the reports he got

if any1 has a way to stop this that would also be good but for now ill just have to get used to it