[GAMEPLAY] Coop vs AI (Intermediate) - Serious AI-breaking bug

Hello Riot, I wanted to point out a serious bug to the gamemode coop vs AI that happens for several patches now on a regular basis. I already saw some bug reports here but without detailed information about the bug.

Seriousness The bug is serious to the gamemode as it completely breaks some bots during the game without them returning to normal behaviour. By removing one or sometimes even more, the whole gamemode loses its sense. It appears in like every third game of coop vs. AI (speaking of intermediates at this point).

Appearance Periode The bug happens regularly since several patches. I had a break from playing leauge of legends so I can't tell a more exact date by my own. However I ran into two guys who could tell me when they started to see the bug. They said it started about patch 7.10 when you removed the case to start the game on red side. They were not exactly sure if that was the correct time. I did not find something related to that in the patch notes of 7.10 however, so I can't confirm that.

What I found was: 7.11: Intermediate bots have ben re-added to twisted treeline.

• If you know the patch when the red side start for players was removed from coop vs AI (intermediates) please write that in the comment section and - if possible - give a source where that has been stated officially (e.g. patch notes).

What happens I saw two types of bugs that might be connected due to the AI behaviour. At some point in the game, th AI champion

• stops working completely. It stands at some point, does not move, attack or use abilities. Killing the AI (or execution by minions) does not break the bug. When the AI respawns, it just stays "afk" in the fountain.

• tries to run through you to reach a fixed spot in the lane. Once they arrive that spot, the champion will just hover around that spot within around 100 units. Killing it (or execution by minions) does not break the bug. When the Ai respawns, it proceeds to try to walk to the same spot all over again. In Both versions, the AI stops attacking, using abilities and does not run away on low health as they'd normally do.

Reproduction There's not much to reproduce as this is on the side of the game and not in the play's hand that easily. However there are some hints that can be given.

• The vast majority of the cases occur in the bottom lane. Sometimes it can be an AI of the top lane two, but never mid lane.
• The bug appears before the first tower falls, so there is no interaction with bots swapping their lanes.
• The two guys I mentioned in the first part gave me the hint, that it appeared much more often on AIs that do not use flash (mostly ignite instead) as a summoner spell.
• There seems to be another bug that could be related to it, where AI champions are shown other masteries in the loading screen than they have equipped in game.

Theory With the information I collected so far I made the theory, that the bug might appear once they try to use a summoner spell like flash even if they do not have it equipped. Maybe there's also the possibility that an AI wants to use a spell like exhaust but do have a flash instead, so basically the other way around. This could explain the two verions of basically the same bug.

I'll going to keep my eye open and I hope others to have that too. If you see that bug in your game than please try to collect some information and post them in the comments:

• What champion was bugged?
• What version of this bug (or even another) was happening?
• When in the game did the bug appear first?
• What summoner spells had the champion equipped?
• What summoner spells where shown in the loading screen on that champion?

I hope some Rioters related to the topic can investigate in that topic. I also want to thank Vastayan Eden (EUW) and Nocian Yanuo (EUW) for their hints.

If you have any other information, you might also post them into the comments. Thank you in advance.