Ok nothing technically wrong with model, however its related to the wall thickness. If I expand the model with horizontal size compensation, it more or less fixes it. I will need to experiment with this as it will make the model too large I think.
Combo of that setting at 0.20mm and scaling down 1% should do the trick.
Just like you mentioned it's most likely a wall thickness issue. have you checked and repaired the file? If not, I would suggest you double check it using one of the repair services. I use https://makeprintable.com/ to fix my models.