Just would like to let everyone know that I have the same issue.
I have an iPhone 6S running iOS 12.2, which btw I don’t plan on replacing or updating. I am an active user at https://support.last.fm/ but since a few days ago I just get a blank page on my phone, whatever browser I use. I have the Discourse Hub app which stopped working.
Recently, I’m only shown the “browser is too old” banner" as shown below:
Will this issue be fixed for iOS <13 users? I don’t want to buy a new phone just to be able to continue using the discourse forum