What are the common problems faced by self-publishing authors on Amazon?

What are the common problems faced by self-publishing authors on Amazon?

Same as all previous reviews - do not waste your time selling on Amazon with Problems on Amazon . They work against you. Had sellers complain orders hadnt arrived and Amazon immediately sides with them and refunds even when orders arrive to them a day later.
Plenty of platforms out there that work for the buyers - avoid Amazon to save yourself time and money