I feel your pain. Both flame hawks I have owned have gone carpet/hardwood surfing. One after 9 months, the other after almost 19 years. I have always used a full glass canopy with the plastic strip on the back cut to fit around pipes. For the more recent 19 year old one, the problem was the way I had my automatic feeder set up to drop into a uses a piece of ~3” long 1.5” diameter pvc to let the pellets sink a little before getting caught in the flow of my powerheads and swept around the tank (thus avoiding going straight into the overflow. I had removed the netting I had at the bottom of the pipe because if got nasty from food. The hawk used to hover under the pipe at feeding time and I suspect my foxface flashed his spikes to intimidate and the hawk jumped.
Jumping has been my number one cause of fish loss post quarantine/acclimation in 20 plus years. 2 flame hawks, flasher and fairy wrasse, neon dottyback. All through tiny, tiny openings in full flasher wrasse along made multiple trips to the overflow and used to hit the canopy hard enough to be heard in the next room on an almost daily basis.
Kim