Issue Summary

Nested tables are no longer supported, but old pages with it are still preserved and it's possible to copy them onto new pages using the legacy editor.

The problem occurs when there's a huge amount of those tables (tested with around 2000 nested tables - a single table inside of a single table, one below the other, 2000 times). This page will not be editable.

Steps to Reproduce

1. Open a page with nested tables
2. Copy the table
3. Paste it more than 2000 times on a new page using the legacy editor.

Expected Results

The page should be published

Actual Results

The page can't be published, with the following errors being shown:

It's taking longer than usual to load this page. Give it a few moments, then try reloading. If it still doesn't load, speak to your Confluence admin.

Unable to communicate with server. Saving is not possible at the moment.

Workaround

Manually transform the nested tables into normal tables by moving the inner table to be outside of the outer one.