Some Olympus cameras add metadata "OLYMPUS DIGITAL CAMERA" to the image which FFPx picks up in place of the image title. It's and odd set of circumstances, Olympus adding their name in a field which isn't meant to contain manufacturer information (there are fields for that) and FFPx prioritising label and caption fields over title fields.
Sue Lambert has come up with a solution for Lightroom Classic users. The goal is to remove all of the text from the Label and Caption fields. Either update an existing or create an import preset to set 'Basic Info' to clear the 'Label' and 'Caption' fields.