New AC unit redirects to account.samsung.com auth page every time I open it

Hi, I’ve done my best searching for an answer and I’m still scratching my head.

I’ve got a v2 Hub and have been using it for years. Last week we got an AC unit installed. A deciding factor in which brand we went with was that the Samsung units integrate into SmartThings.

I went through the onboarding process for the unit, and after a couple of failed attempts (I can’t tell my Google Wifi router to disable 5GHz so we had to get creative and dangle it out of the window to let the AC unit to see the 2.4 network) it connected and showed up in the Smartthings App. At some point in this process I was asked to log in to my Samsung account and did so. I can see the AC unit in my Samsung account dashboard as a “Registered device”

Now, every time I open the AC unit in SmartThings, I’m redirected to account.samsung.com (the full URL starts with /accounts/ANDROIDSDK/signInGate before a ridiculously long auth code)

The page says:

Continue with {my email}

Applicable service:
SmartThings DA Device Plugin

Then two buttons labelled “Continue” and “Cancel”

If I hit continue, I land back in SmartThings and can control my AC unit
If I hit the cross on the webpage, I land back in SmartThings and can control my AC unit
If I hit cancel, I land back in SmartThings and can usually controll my AC unit - there have been a couple of times things are greyed out and I don’t know if I was just impatient.

I’ve got my devices linked through to Google Home and also Home Assistant, and I can also control the AC unit from either of those, but I can’t for the life of me figure out how to stop it redirecting me in the SmartThings app. I assume it’s something to do with an OAuth token not being correctly saved, but I’ve no idea how to fix it.

Edit: I’ve just noticed that if I go to my.smartthings.com and click settings it’s a little unsure who I am:

I wonder if that’s relevant?

Help!

bump. Anyone from @SmartThings able to advise?

Have you contacted ST Support to let them investigate? in the app, tap on Menu, select Contact us > Error reports?

Any time I encounter a Samsung Account login I breathe a sigh of relief when I get past it. Changing the default browser has been seen to help users out of various predicaments and I’ve found turning off the mobile Wi-Fi to be beneficial on occasions, even though I’ve never been clear why. I’ve also seen requests to accept the Privacy Policy in the last week or so, and those have form for creating havoc.

I temporarily switched my default browser to Duckduckgo.

Smartthings then got very upset at trying to authenticate for a few days when accessing the AC unit - blocked login due to “suspicious activity”

Then I switched the default browser back to Chrome.

At some point I also went into my account settings and said “Yes” to one of the two privacy options - the less intrusive one, I can’t recall the details.

Anyhow. I no longer see the “authenticate” screen every time, so one of those things must have done something, but I don’t know which one. Gut feeling is privacy though.