TA of France makes the 33t chain ring . the diameter is reduced ti wherether is not enough metal to make the counterbore to make the sleeve nut flush.

same thing if you get stainless steel 34 t the manufacturing uses no counterbore
because the material is not as thick as one would use if using aluminum
so the sleeve nut is not flush..
you need , in some cases to take the file to the end of your crank arm,spider
to make clearance for the smaller 33tring..
but a tooth or 2 on the wheel makes more difference..

Dude.. don't get attached to parts if the function no longer works for you.

it's a tool .. to get you places..
1 tooth on the cog on the hub makes a bigger difference..