This specific copypasta breaks the message field

(#3917) Bug Open: Needs triage desktop messaging

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Comment by Fullest
Okay, real talk: I tried copying smaller and smaller parts of it, and this is the point where it breaks:
:bangbang::bangbang:HOLY FUCKING SHIT:bangbang::bangbang::bangbang::bangbang: IS THAT A MOTHERFUCKING AMONG US REFERENCE??????!!!!!!!!!!11!1!1!1!1!1!1! :scream::scream::scream::scream::scream::scream::scream: AMONG US IS THE BEST FUCKING GAME :fire::fire::fire::fire::100::100::100::100: RED IS SO SUSSSSS :detective::detective::detective::detective::detective::detective::detective::red_square::red_square::red_square::red_square::red_square: COME TO MEDBAY AND WATCH ME SCAN :hospital::hospital::hospital::hospital::hospital::hospital::hospital::hospital: :hospital::hospital::hospital::hospital: WHY IS NO ONE FIXING O2 :face_with_symbols_over_mouth::rage::face_with_symbols_over_mouth::rage::face_with_symbols_over_mouth::rage::face_with_symbols_over_mouth::face_with_symbols_over_mouth::rage::face_with_symbols_over_mouth::face_with_symbols_over_mouth::rage: OH YOUR CREWMATE? NAME EVERY TASK :gun::angry::gun::angry::gun::angry::gun::angry::gun::angry: Where Any sus!:question: :question: Where!:question: :question: Where! Any sus!:question: Where! :question: Any sus!:question: :question: Any sus! :question: :question: :question: :question: Where!Where!Where! Any sus!Where!Any sus Where!:question: Where! :question: Where!Any sus:question: :question: Any sus! :question: :question: :question: :question: :question: :question: Where! :question: Where! :question: Any sus!:question: :question: :question: :question: Any sus! :question: :question: Where!:question: Any sus! :question: :question: Where!:question: :question: Where! :question: Where!Where!
Note that the message box is able to successfully render 101 of the emojis (yes, I counted. I am being serious here, after all), but one of the early ‼️ emojis fails to render. I think the number of emojis has something to do with this bug, but simply copypasting 100+ emojis works fine so there is more to it than just that. Copying another emoji past this point causes the message box to become unresponsive.