Crashes if input is too long

[msparkles]

E.g. when I type a lot of ？ (？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？)
the game crashes.

IME: fcitx5
Input Method: Chewing (新酷音)

Crash report:
https://pastebin.com/ww74cSJx

[msparkles]

In other applications, the buffer is automatically flushed after a certain amount of characters.

EDIT: Screeenshot of that: