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Unicode emoji rendering in Twitter thumbnails
Pool_pm links in Twitter do not correctly render automatically generated thumbnails, when (onchain svg) thumbnails include unicode emojis. Specifically, some emojis are replaced by their corresponding Hex encoding.
The issue is confirmed for example with https://pool.pm/asset1m34y7vhg0mjxtjfca9eadmmtu0t9txcfzyaa9e on Telegram:

Emojis are now supported, but colors are not yet displayed correctly.
Example on Discord:

The issue comes from an underlying libsrvg library. The fix will be included once done in this library:
https://gitlab.gnome.org/GNOME/librsvg/-/issues/911