I recently encountered this issue and successfully reproduced it. After entering text in Korean into a UITextView, if you input multiple ✔️ emojis on the next line and insert line breaks between the emojis, they don't appear as one per line; instead, they appear two at a time. Deleting the emojis that are displayed two at a time leads to the mentioned error. I haven't found a solution yet, but I wanted to share this information first.

I recently encountered this issue and successfully reproduced it. After entering text in Korean into a UITextView, if you input multiple ✔️ emojis on the next line and insert line breaks between the emojis, they don't appear as one per line; instead, they appear two at a time. Deleting the emojis that are displayed two at a time leads to the mentioned error. I haven't found a solution yet, but I wanted to share this information first.