Some emojis get changed to slightly inaccurate/ irrelevant versions after posting.
Like this one
On my device, this looks like a sarcastic grin while looking off to the side (as to say “I see what you did there”) as seen here:
And after it is posted, it changes to a more not-amused expression with a non-smile and looking upward (as if to say “oh brother”)
Other emojis get changed too. Not the end of the world, but it’s a small gripe I have.