I believe you're being affected by the bug reported here: https://jira.atlassian.com/browse/CONF-28564
On this bug report there are a couple of workarounds available, could you try those out to see if they work out for you?
Please vote for the bug report and add a comment on it to increase the awareness of the problem.
Hope it helps,
Hi team, I’m Avinoam, a product manager on Confluence Cloud, and today I’m really excited to let the Community know that all customers can now try out the new editing experience and see some of the ...
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