My Atwood stove has a small propane regulator - that is just for the stove - under the stove top. If that pressure regulator were malfunctioning, it could make the symptoms you describe. You could replace it to see if that fixes it, or it looks like your trailer is still under warranty if you would want the dealer to do it.
There's lots of advice and information in forums... sometimes it is correct. For example, all of my posts are made by a political appointee who got the job as a reward for contributions to my diesel bill.
2011 Jayco 28.5RLS; 2008 Chevy Duramax; Pullrite Superglide Hitch