This seems to be the result of some customization or third-party plugin.
Could you try the approaches below?
1) Try resetting the custom decorator from Administration >> Layouts or Browse >> Space Admin >> Layouts.
2) If the approach below do not help, try to set your Confluence Plugins on "Safe Mode" and check if the behavior persists;
As pointed out by Theo, there is bug in Confluence occuring in Chrome: https://jira.atlassian.com/browse/CONF-28415 Do check it out and see if the workaround fixes the issue. Otherwise, it might be caused by customization or third party plugins.
Just a quick note about this bug. The issue is resolved in Confluence 5.1.3.
If you are on a version of Confluene pre 5.1.3 we have a plugin fix for this editor height issue available in our marketplace.
Hi my Community friends! For those who don't know me, I'm a product marketer on the Confluence Cloud team - nice to meet you! For those of you who do, you know that I've been all up in your Co...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs