I have seen this happen with quite a number of Edit hotels I was looking at. They show up as sold out as an Edit hotel when I search under my CSR card. However, not only are they available with Amex under FHR as well as on their own website, but they are also available when I search on Chase Travel under my Preferred card but in that case it's not under the Edit banner so I obviously will not get the $250 credit like that. It's very frustrating when Chase does this and I didn't only search a few scarce dates or even over a 3 week period; I did many searches over several months until the end of the availability calendar and hit the same wall with those hotels consistently showing up sold out under Edit and wide open availability everywhere else. I don't understand how Chase will show the same hotel as available not as an Edit booking but will say it's sold out when I want to book it as an Edit. And these are not cheap Vegas hotels, I'm looking at $500-$750 per night hotels so I just don't get it.

ETA: I just check PH Seol and it has this exact same issue. Search under my CSR and every single date randomly chosen for the next 12 months is sold out. Switched to my preferred and bingo it shows up with wide open availability and even has points boost at a 1.4 cpp rate. Not nice.