Modern high speed hang gliders are the problem back in the 70's we had limited performance but never these tip stalling problems and landing speeds were much lower.
...Among things to note and learn from this compilation: 1) Use wheels on the basetube; the larger ones can prevent or make less worse those abrupt bar-digging-into-ground stops. 2) X-fer hands from basetube to uprights sooner during final approach. 3) Don't let go of an upright during the crucial seconds right after launch. 4) Perform a tactile as well as visual pre-flight; *tug* hard on those hang loops to ensure one is hooked in.
Or just learn to flare out and actually land. Personally I think crossbars are horribly outdated and dangerous, same with fixed wing hanggliders (drop quickly, fall 200 feet before realigns, spins, stalls, etc). Flex gliders with new controls are on the menu. I'm designing a few, it'll probably be a few years before I ever produce any for anyone else though. Use two hang loops at the right height instead of an extender. 2 is 1, 1 is none. People need to train for crashing more often so you have the right mentality. I think crossbars are horribly inefficient and too simple for the dynamics of true flight. They're also cumbersome, hard to use/counterintuitive, and seem to cause injury. Personally I'd look into paragliders until I design a better answer lol. Dominator is the safest one on the market.
