Looking for a bit of guidance. I got an Orbea Terra in March and everything has been great until this week when a creaking coming from the bottom bracket started. It wasn’t constant but got worse this morning on my long ride. On closer inspection the chainring side seems to unevenly loosening itself - see pictures below. On the wider side it’s a shade over 2mm and on the narrow side it’s less than 1.5mm. Bottom bracket is an FSA MegaExo PF30. No issues on the non-drive train side, photo for reference.
Unfortunately I don’t have a particularly good relationship with the bike shop who supplied it any longer, so if I have to go back I’m keen to be as clued up as possible on the issue and how it may have arisen. I haven’t crashed and there have been no heavy impacts to the drive chain crank arm. I’m having a proper look at it with a friend tomorrow who has a good toolkit but would be keen to hear any thoughts from the forum - thanks in advance!