Conversation Grouping not working in iOS App

Heya devs!

It seems that though I have “Conversation Grouping” turned on in the web interface (Settings > Appearance), my email threads are not grouped in the iOS app. They are however grouped in the web interface!

This has proven to be a bit confusing and irksome, switching from the web interface to my phone and seeing a large wall of messages that all live neat-and-tidy in one single group in a “normal” desktop setting.

I can’t seem to find a setting in the iOS App that will allow me to turn on Conversation Grouping specifically in the app. Am I missing something, or is this a known issue?

Thanks all!

Edit: iOS App version 1.12.7 (4840)