Bug Report

Steps to reproduce

Demo here: https://3v799.csb.app/#/test1.md

When hover in sub-level, title render wrong.

What is current behaviour

Get wrong title ( not show content )

What is the expected behaviour

Show correctly content

Other relevant information

• Bug does still occur when all/other plugins are disabled?

Please create a reproducible sandbox

Demo:
https://codesandbox.io/s/solitary-fire-3v799?file=/test1.md