Ok, looking at that some more:
These are your cranks?
I see the issue with using the outer ring in the middle ring position.
I thought your rings were without a recess, but it is on the wrong side.
I have thought about whether it would be possible to counterbore a recess into the rings, but the remaining material could get mighty thin.
You might be able to grind off part of the bolt heads so they wouldn't interfere, or use a slightly larger small ring.
Looking at rings. You might try a "Flat" ring that should be reversible.
For example the Vuelta Flat rings.
https://www.ebay.com/itm/Vuelta-Mtn-...k/372593545351
Vuelta Flat Mountain Chainring - $12.95 - Bike Parts 360
Unfortunately I'm not seeing photos of both sides.
Or, try a different crankset.
