Propane lines are supposed to be outside the bellypan, so if they leak the propane will be carried away instead of accumulating in the bellypan where it could be ignited. I recently had my exterior propane lines replaced because they had taken some road damage over the years. Now they are protected with hose wrap.
If your rig doesn't have it, you should consider adding smoke, CO and Propane detectors inside for your safety while camping. My RV shop had a fit when they found my vintage trailer had none of those new-fangled safety features, but I have added all of them since then!
Congrats, Minuets are a great little trailer, even if it is feeling blue