Hello, i am not sure if I should post there or on bug (for me is not a bug).
But on dark backgrounds, we saw these emojis with white corners:
Are these custom emoji or are you referring to an emoji set? Which emoji set are you referring to?
The included emojis. You can choose between Apple, Google, Twitter, Win10 and more styles.
So you set Win10 as styles for emojis. And you use them on dark themes.
Aha maybe you can look monday @joffreyjaffeux
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Which version of Discourse is this?
Some of the Win10 flag emoji do have the white background, but many of the ones you’ve pictured above have been updated, these are the current versions of 
and 
in the latest tests-passed:
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v2.3.0.beta5 +36
that one
I have no repro on master, this is either fixed or something else:
I’m closing for now, please reopen if it persists through next update
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Indeed, I can repro this, weird. 
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