My guess would be, that it has to do with the recent Android release of the mobile app… and I can rememeber, that there was another issue with the generator. So I would assume, that that change in the Android version will also come to the iOS version… 
See here:
- Bitwarden Browser Extension UI Design Refresh - Early Preview Now Available (and later posts here to that…)
- Bringing intuitive workflows and visual updates to the Bitwarden browser extension | Bitwarden Blog
PS: The blog article is one of the early informations on the browser extension redesign… the first “testable” beta was available around 5-6 weeks ago… and it may be released next month (or January?).