Visible message actions options only partially working

Expected behaviour

The desired behaviour for me is that I can add the 'Move' action to action taskbars at the top of the screen by amending the options under 'Settings > General settings > Display > Visible message actions'
a. 'Taskbar actions' for visible message view reflects settings. (This worked in K-9 Mail version: 5.600)
b. There doesn't seem to be an option to change the available 'taskbar actions' when selecting messages in 'message list', so naively I would expect the settings to apply to this too.

Actual behaviour

I went to 'Settings > General settings > Display > Visible message actions' and selected 'Move' and deselected 'Delete'
a. Bug: Available 'taskbar actions' for visible message view is: Read/Unread, Next, Previous, Menu ('Move' not added but 'Deleted' was removed)
b. Enhancement: Available 'taskbar actions' when selecting messages in 'message list': Delete, Read/Unread, Archive, Next, Previous, Menu

Possible related issues

https://github.com/k9mail/k-9/issues/1341 (describes an issue which might be related)
https://github.com/k9mail/k-9/issues/1363 (describes similar enhancements but is now closed)

Steps to reproduce

1. Go to 'Settings > General settings > Display > Visible message actions' and select 'Move' and deselect 'Delete'
2. Go back to 'visible message view' or 'message list' and select a message

Environment

K-9 Mail version: 5.718 (Beta via Google Play store)
Android version: 9 (Lineage OS 16.0)
Account type (IMAP, POP3, WebDAV/Exchange): any
Please take some time to retrieve logs and attach them here: mot necessary
I exported the k9 settings file and can confirm that the keys 'messageViewMoveActionVisible and messageViewDeleteActionVisible are set to true and false respectively

Start by reproducing the settings change under Settings > General settings > Display > Visible message actions in both visible message view and message list selection. No source file or test is named; done means the configured Move and Delete actions are reflected correctly in the relevant taskbars, with the expected behavior clarified for message-list selection.