With the Grav v1.3.10 and Admin v1.6.7, I have the follwing problem:
Whenever I save a page in Export mode, all Frontmatter (including title etc.) is deleted and replaced with
media_order: ''
Has been reported before: #1252
I've had the same issue when i turned edit mode to expert in the admin , when you turn it off and just go to the page itself and edit in expert mode over there, it works just fine for me, might be the same thing for you
Thanks for the tip, it helps. But that's just a workaround.
Yeah, it needs a fixo defo :)
To confirm, this only happens when the 'default' mode as set in the admin options is set to "expert"? And it works fine when you leave the normal mode, but switch to expert on the page?
Confirm - in my case @rhukster
This only happens when the default mode in Admin Options is set to "Expert".
Can you please test with Grav 1.4 RC with Admin 1.7 RC, because I can't replicate it there. I think a bug I fixed in handling frontmatter might of fixed this too.

Screenshot to show a save on a test page.
testing atm
Before:

After:

Issue still persists
Admin version:
| 230 | Admin Panel | admin | v1.7.0-rc.3 | installed |
@RobLui can you zip up your Grav site and let me download it? I think this might be related to a plugin or at least a configuration setting.
Also what page type is this? Does it happen for all including default ?
I've been having the same issue, also having the same issue after upgrading to the RC releases. The bug is occurring on a template other than default, However just tested using default template, same thing occurs.
@rhukster I can give you a zip copy of my site, as long as you don't need anything in pages or accounts. Would that suffice for troubleshooting?
Can you check Slack :) ? Pm'ed you @rhukster
Found it and fixed.
AWESOME :-)
Thanks @rhukster , patched our deployment with the change, and everything is working great over here. Appreciate it!
Thanks @rhukster 馃憤