There are two major probems concerning data loss. Presumably this is because there's some kind of data sanitation going on that's too aggressive and/or too intelligent for its own good.
First of all,
Anything between < and > is thrown away. Without warning nor consent. After saving, Just poof, gone. There's probably a mechanism in place to remove all HTML tags, and while this is a questionable thing to do in the first place, obviously it is too aggressive.
Consider for instance a title like "This rose < the red one > in a vase". It's a crappy title, but it serves the usecase. After saving this title, what's left is "This rose in a vase".
This should be fixed. This falls under the category data loss. There are no warnings, and the user isn't being given consent that this is happening, or going to happen.
Ideally, just remove this nonsense mechanism and just *escape* angle brackets. That should be more than enough. YES I KNOW ABOUT XSS, but this is concerning data entered by an administrator, who will not XSS their own website I imagine.
Secondly,
Anything, anywhere at all, any piece of text entered no matter where, with an emoji in it, will be cleared ENTIRELY. It's not that it won't be saved, it's overwritten with an empty string if there's an emoji anywhere in the string.
What nonsense is this?! What other characters will be causing this behaviour? Again, the category is data loss. This should be fixed first thing, as, well, it causes data loss!
I wonder what mechanism decides to destroy anything and everything that has an emoji in it?... Well, someone didn't do the pile of poo test, for sure:
https://mathiasbynens.be/notes/javascript-unicode#poo-test
Anyway, please fix these problems. They need not to exist in any system really. It's a simple matter of testing. Heck, even a simple unittest will be able to catch problems like these.