You’re right, wrong choice of wording on my part.

Could be cheaper enamel. Le Cruset specifically mentions it in their cleaning instructions

Bar Keeper’s Friend, or a paste of baking soda and water, also comes in handy for cleaning tough stains, oil residue and marks on your Dutch oven as well

I use it on my enameled dutch oven all the time and I’ve never had an issue.

Definitely this, but also if you are washing it and re-seasoning it after if you use too much oil it can cause it to get sticky.