Sorry about your discovery and that it happened on a tight trip. I hate to say this and I say it kind of in jest, but "Welcome to RV'ing". If you read the forum most of the posts are of those wanting to know how to fix something, many on their brand new coaches. Most not as dangerous as yours, but many that are stranded with mechanical issues. I had a call from a member yesterday stranded in W,.VA with a DEF issue until Monday taking his Grand-kids on a beach trip.
Thank you for letting other 27U owners be aware to check their hoses in that location. Lets hope it was a freak situation. Hopefully that photo has been sent to Entegra so they are aware of the problem.
Chuck in SW FL
Digital 2021 Cornerstone "B"
A "Digital" 2019 Cornerstone "B" Traded
A "Classic" 2014 Anthem 42 RBQ---Sold