Typing multi-byte characters in a colored cell adds another column to a table in Safari

Issue Summary

Typing multi-byte characters in a colored cell adds another column to a table in Safari. it doesn't happen in Chrome, Edge, Firefox.
AtlassianSupport 2022-02-18 at 16.37.43.mov

Steps to Reproduce

1. Color the cell background.
2. Type multi-byte characters such as Japanese in the above cell

Expected Results

The characters are entered and nothing else happens

Actual Results

A new column is added to the table and the characters are entered into it.

Workaround

• Use the browsers other than Safari.