IDE popups malfunction when emoji exists in docstring

Steps to reproduce

1. In a new empty project
2. Create a new .ts file, write a simple type in typescript.
3. Add an emoji in docstring.
4. Hover over the type.

Expected result (correct result):

Popups should show up normally.

Actual result (faulty result):

Disappears immediately.

I have created an issue youtrack. Attached a video there too.

https://youtrack.jetbrains.com/issue/IDEA-369432/IDE-popups-malfunction-when-emoji-exists-in-docstring