Trying to mention users with @ character in the quill editor throws TypeError s.domNode.getBoundingClientRect is not a function in the console and the suggestions are not shown.

Steps for Reproduction
The error is a little tricky to reproduce as only a few of my company's clients occasionally experience the issue on production.
screenshot below

Expected behavior:
The mention feature should show the suggestions

Actual behavior:
The following error is thrown in the console and the suggestions don't work

TypeError
s.domNode.getBoundingClientRect is not a function

Platforms:

browser: Chrome 95.0.4638
device: Mac
os: Mac OS X 10.15.7

@jhchen @byronm I'll appreciate it if you could look into this. Thanks.