Thanks for highlighting this @pherjung. These kinds of issues can be challenging to resolve without access to the wifi network in question, however I think we’ve seen something similar to this before, so it’s definitely worth looking into.
I’ve recorded an internal issue for it and tagged it as “tracked”. I’ll do my best to post any updates about it back here.
And if anyone else experiences this on other wifi networks with captive portals, it would be useful if you could please share your experiences here.