Darius AA Bug when interacting with Rammus

When playing a normal 5v5 game on Summoners Rift i found when laning against a Rammus i was not able to AA some minions. To begin with i thought nothing of it and put it down to me miss clicking. However when ganked Toplane by a Vi it became apparent i could not AA her either as i died pathetically. At this point i knew something was up, however the icing on the cake was when i walked into river to grab the scuttle crab and found that i simply couldn't hit it, and ended up going for a leisurely stroll with it until none other than Rammus turned up to kill me. Overall this bug lost me a game as i was unable to capitalize on my won lane and although a normal was rather frustrating.

After the game in which i found the bug i then tested the bug against a Rammus bot in a custom to see if i could replicate the bug, and it seems that the bug occurs after these two events:

(1) Rammus Taunts Darius using Puncturing Taunt (whether W (Defensive Curl Ball) must be active may also be a step). (2) Rammus then uses Powerball to knock back Darius.

The bot luckily managed to do this for me and after killing the Rammus i went to push a tower and guess what? i couldnt attack the minions, making me sure that this AA bug on Darius is definitely linked to Rammus. I hope the bug can be fixed asap!

P.S. This was on the EUW Server