Sometimes when throwing gnar's boomerang it can go crazily off course on the return trip with no way to go catch it and really messes up trading in lane. I am playing gnar more since the recent buff and it seems like this happens quite often. Feels like the bug had been around for a long time but anecdotally it feels more so now.
Record it; post a clip would be best way so rito knows exactly what it's doing, you can edit you're posting and add it without making a new thread
I think it depends on where your walking when you throw it kinda like Draven axes. I know I have had times when it goes way off course but I do a lot of movements when laning so I assume it's from that too
I also have this bug from time to time, here's a thread with a video included: https://boards.euw.leagueoflegends.com/en/c/bug-reports-eu/Rue0uRvj-gnar-boomerang-flying-back-wrong-euw-patch-76
