I have the opposite problem to what OP was reporting. Just tried external gas connection for the first time on my 2022 Vegas 25.6 with Coleman camping stove
https://www.coleman.com/camp-kitchen...000017463.html
Regulator that came with stove is external, designed for small propane bottles, so instead I used QC hose from Amazon which has correct mating ends.
Surprisingly the gas flow is way too low, barely keeping the flame going.
I suspect the gas line from distribution block to QC connect is obstructed, because all other gas appliances connected to same distribution block work fine.
Has anyone used the same stove with their MH gas connection?