Extension of #5414
Navigation to any page, dialog or popup, and then hitting the back button results in the "New Tab page" in Chrome for iOS.
Simply setting the hash works though:
... and turning off pushState works too. So, it's likely the pushState code that's causing this.
For 1.3 we're going to opt chrome on iOS out of pushstate provided that's possible based on the UA 👎
drop Chrome for iOS out of pushState support Fixes #5426