Im having trouble with uploading mesh to roblox

This just started today, when I uploaded a mesh to roblox, its triangles were reduced and was uneven. I have no idea why this happened and would like help on how to fix it please. Here are the images of it when uploaded to roblox compared to what it’s supposed to look like.


image

Roblox removes the triangles for proformance, setting RenderFitelity to Percise will force it to use all the triangles