Emojis in the name of Collections are now greyscale instead of coloured

I apologize if I am posting in the wrong place.

I have become a heavy user of Collections in Edge. Since I have a lot of them, I've taken to using emojis at the front of the name of the Collection to colour code (group) collections that are related. Here is an example:

🟨 Collection one

🟨 Collection one A

🟫 Collection two

🟩 Collection three

🟩 Collection three A

🟩 Collection three B

This has been working great until today. The most recent update of Edge has altered the appearance of the Collection names. The emojis are still displayed but in shades of grey instead of the usual colours. When sorted by name, they still sort as before.

These grey emojis used to be green:

Is this a bug or is there a setting I now need to set to get the colours back?

PS Kudos to the developers for the performance improvements that have been made to Containers. Would this be the venue for making suggestions?