Flag emojis cannot be trained as utterances

[umnibot]

Just noticed that some emojis could be trained as utterances, but some cannot.

For example: 🚔 - this can be trained 🇺🇾 - but this and other flags cannot

Just give it a try to reproduce it.

It is by design or a bug?

[umnibot]

But some flags can. For example this one: 🇹🇭

[Barbog]

Closing due to no movement on the issue. Please re-open or file a new task should the issue be persisting.