The fixed headers are not working consistently for fixed-width/responsive tables in the old editor

Issue Summary

For tables in the old editor, the table header configured in the edit mode is not being fixed consistently when viewing the table in the view mode. Sometimes, the header gets fixed, but if you refresh the page, it is scrolled with the table content.

Environment

• Old editor

Steps to Reproduce

1. Create a page with a scrollable table in the old editor and set a header for it (choose either fixed width or responsive);
2. Publish the page and check if the header is fixed.

Expected Results

The table header should be fixed everytime you access, publish or refresh the page.

Actual Results

The table header is not consistently fixed. Sometimes it is, sometimes it is scrolled with the table content.

Workaround

Currently, there is no known workaround for this behavior. A workaround will be added here when available