Syndra Ultimate Bug

When I play Syndra, I often seem to get a glitch when I use her ultimate on someone. Her ultimate is a point and click, and it has that cursor. But sometimes the ultimate will freeze the cursor and it will be stuck in that diamond icon no matter what I do. This is a problem as I often click on the minimap or drag my screen to move my vision, but when this bug happens it is an issue. I can't even click on things to buy in the shop like this. just wanted to report this glitch.