I have a Cannondale CAAD Optimo Disc Tiagra that came with the FSA BB30 bottom bracket and the FSA Omega BB30 50/34 crank set pre-installed.
A couple of weeks ago I noticed that the chain started slightly touching the front dérailleur at one specific part of the revolution (right when I start applying torque pedalling down with my right foot). I took the crank set out and found that the spindle has slightly moved out from the drive-side crank (the one that it's supposed to be permanently attached to) and was a little wobbly. I applied a couple of hits with a hammer and brought it back in; assembled the crank set back to the frame and the problem was gone. Unfortunately, after riding a couple of miles the same problem re-appeared.
Has anyone had any experience with spindle sliding out of the drive-side crank and know how this could be solved? I tried removing the spindle out of the crank so that I could apply some glue and slide it back in but it doesn't seem that it can be removed, it simply slides out ~2.5mm and subsequently causes some lateral movement of the crank set.
Any help and opinions will be appreciated! I attach a photo of how it looks like. You can see how far the spindle should slide in normally.