THE GOOD:
1 - Yes the issue with SENT messages not appearing on the Android app IS now resolved!
2 - Now the AdWords ads ARE appearing at the bottom of the iOS app (before they were appearing only on the Android app).
THE BAD:
3 - I tried Facebook login with only the iOS app for now, it behaved bizarrely and in the end failed to login properly.
I tried it on my iPhone only because on that phone, I have the Facebook app and it is logged into my forum Facebook account, which I know works for login to the my forums because I do login via FB on the forum website daily (in fact, I login to my forum pretty much ONLY via Facebook I almost never login any other way, so I know my forum works fine for via FB login):
So: on my iPhone I am already logged into the same FB account, via the FB app, I always use to login to my forum.
Anyway, when trying to login via FB on the app, first an image appears stating that "9a391___3167" Wants to Use "facebook.com" to Sign In.

https://i.imgur.com/GKk0REs.jpg
This in itself is startling because it doesn't refer to the my app but to the vbulletin number for the app, but I clicked continue anyway.
Then it asks you to Log into your Facebook account to connect to testvbapp which is again startling ("testvapp") but I went with it.

https://i.imgur.com/DsXDUPt.jpg
Then it tells me that my FB account is not yet linked with an account at my forum, which is incorrect, but I clicked Ok.

https://i.imgur.com/9taC1Pk.jpg
The end result is login, but as an Anonymous User.

https://i.imgur.com/eFgWHTG.jpg
4 - So then I tried to login to the app for Facebook via simple login of FB registered email + FB password. In this case I still get the bizarre asking me to
Log into your Facebook account to connect to testvbapp which is again startling ("testvapp") but I went with it.

https://i.imgur.com/DsXDUPt.jpg
and I also get as far as this
tells me that my FB account is not yet linked with an account at my forum, which is incorrect, but I clicked Ok.

https://i.imgur.com/9taC1Pk.jpg
But this time the error I get is a new one Error Mismatch in catcher, error_invalid_facebook_session and it still won't let me login via Facebook, and in fact won't even let me go back and login regularly until I click the bottom to Disconnect Facebook from the login.

https://i.imgur.com/KlouiBBl.jpg
5 - Facebook login doesn't work at all on the Android app, get an error "Given URL is not allowed by the Application configuration: One or more of the given URLs is not allowed by the App's settings. To use this URL you must add a valid native platform in your App's settings."

https://i.imgur.com/cp0qiHEl.jpg
6 - The Firebase notifications for newly received messages are still not working. Previously, it was working intermittently with the Android app only, now not working with either iOS or Android.
I opened up the phones, iPhone and Android and sent a test message (PM) to the account that was logged in, and no notification came through, and after switching over to the apps, I did see that the message made it.
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