Has anyone ever encountered problems with their chainring moving/shifting while putting backwards pressure on the cranks ?
The chainring bolts are tight, yet the chainring holes are just slightly larger than the bolts themselves. I am getting some pretty significant wear and grinding of the ring where it is obviously slipping back and forth in the hole of the crank spider.

...........and yes, before I get the peanut galley response THE BOLTS HAVE BEEN TIGHTENED USING A 5MM AND CHAINRING NUT TOOL.
So the bolts are as snug as any SS setup I have run in the past.

I noticed similar slippage while on road, running a set of Profile carbon cranks with the removable spider.
I had to loc-tite the spider retaining ring to alleviate this on the road.

Setup:
(FSA V-Drive Extreme cranks 104 bcd, with a Snap 38t BMX 6061-T6 ring).