@Dave-and-Deb0 I "tested" the behavior in every way I could think of (I was in the software biz for over 25 years and used to run through a lot of test scenarios), including logging out of both platforms (Chrome browser on a Mac and the iphone app) in mulitple differing orders, clearing caches, opening other parts of the app in different orders, altering other settings in between, and even rebooting the phone at times. The behavior is consistent. Again, I've only "tested" this on our own single listing and on 2 iphones of different generations. If you're seeing a different behavior, the reason might be that it's an iPhone bug that doesn't occur on Android.
I have a really old (gen 2 iPad), so maybe I'll check later tonight to see if it acts the same as my phone.
And, once again, the behavior has even more wrinkles than I've gone into, depending on some of those variables I mentioned above.
The key take-away, I think, is that hosts should at least *check* their listing from an iPhone, if possible, to see if what they (and potential guests) see there is what they expect to see. If not, one current fix (I haven't found another yet) is to go with that whackily high charge to deter people from bringing the whole darn clan! 🙂 Especially if IB is turned on and the host doesn't like surprises.
Also, @Dave-and-Deb0, you've now totally ratted me out as Dede's not-so-silent co-host -- the one who posts huge rants while logged into the listing, making those rants appear under her name. Darn! 🙂 Just kidding; I've mentioned that myself a few times, and informed others, including the moderators, privately.