Sharepoint JSON Column Formatter - inlineeditfield - date not working as expected

Hi All - I thought I had already posted this issue, so if it appears again out of the ether - apologies for the double post!  At least I can distill it a bit better 2nd time around:-)

I have a list where I have edited the columns using the inline edit field to provide the experience my users want.  Everything was going great until yesterday. I noticed that the inlineeditfield for the date column wasn't working as expected.

Expected behaviour:

Click on date cell.  Inline date edit opens - textbox with a calendar icon:

Click the calendar icon and the calendar opens.  Select a date and date field updates.

Pretty straight forward.  Until I tried the behaviour yesterday, and it has gone awry.  Most of the time when I click the calendar icon, the just textbox just shuts, as though a click has been made outside the current focus, and nothing is updated.  But even more infuriatingly, sometimes the calendar opens!  I couldn't see a pattern.

Microsoft Edge for Business v117.0.2045.60 64bit.  Sharepoint 365. 

The behaviour happens with very basic JSON - 

{schema,

"elmType":"div",

"txtContent":"@currentField",

"inlineEditField":"@currentField"

}

The inlineEditField textbox is created dynamically and closes as soon as it loses focus - so using DevTools to shed some light doesn't work.

Anyone seen anything like this before?  Know how to fix it? Know where to report a bug?  Or have a work-around that somehow still uses the calendar.  Current work-around is to enter the date manually - but this is 2023 and users shouldn't have to do that.

Cheers

James