Chain drops off outwards betweeng plastic guard and last cog on crankset Chain drops off outwards between plastic guard and last cog on crankset. This effect i mostly managed to remove by moving front derailleurs inside (not happened since). But looks like the core issue is not solved. Sometimes under applied torque chain getting of the cog and just slips few teeth with cracking noise. It's not happening on the stand.
I drove not more than few hundreds kilometers.
I cannot move front derailleur even more, as frame will start rubbing the chain.
Drivetrain: Shimano Claris 3x8. Shimano chain CN-HG71 7/8 with KMC masterlink.
Chain is new and waxed, front and rear derailleurs are new and installed by me. Wiring is also new.
Crankset is a bit older than other components but does not look obviously bent. However I do not know how crakset behaves when I'm applying the torque.
How I can diagnose core issue ?
The front derailleur needs to be correctly adjusted for height, rotation and then for the H limit screw adjustment/cable tension
There is a good guide to the procedures here
https://www.parktool.com/blog/repair-help/front-derailleur-adjustment
I would also strongly recommend that you review the Shimano documentation. https://si.shimano.com/#/en/DM/GN0001
The front derailleur helps keep the chain on the largest ring, so if it's not properly adjusted it's not unusual to fall off.