The water heater pilot on any RV water heater is prone to blowing out, depending on all kinds of things ... wind, altitude, adjustment, etc., but even the pilot can also be overwhelmed by the reverse "whoosh" created when the burner cuts off from full burn back to pilot.
It's not a problem. It's just one of those things you learn to live with.
Over the years, we've developed what I call a demand
hot water system. When Pam demands hot water, I go out and turn on the water heater. It heats up easily in one cycle. What I usually do after a cycle or two, is turn the knob back to pilot
instead of the on position. Once the water is heated, we've found, running just the pilot keeps it warm enough for hours afterwards.
We rarely, if ever, leave the water heater going and blowing all day ... and never on at all during the night.
Something else that can affect the strength of your propane
system ... especially with new propane
tanks ... is whether or not your new propane
tanks were properly purged when they were first filled.
You specifically have to ask Bubba at the propane place to PURGE your tanks prior to the first filling. Usually you have to pay $10 or so in addition to the regular price for filling the tank.
Not trying to worry you, but did you make sure your new propane tanks were properly purged prior to filling?