Looking for a little lower gearing on my gravel bike, I replaced the crankset with a FSA Omega with 46/30 chainrings, along with a new bottom bracket & chain.
If I stand on the pedals while on the small chainring, I can get the chain to slip & pop off the chainring. This makes starting and climbing pretty rough ;)
The front derailleur looks to be adjusted correctly.
I'm looking for other ideas of what could be causing the chain to pop off, or maybe the FSA Omega crankset is just incompatible with my bike?