Hello Everyone,

I was in the Material Editor today using the new version of UE for the first time.
I noticed as I was trying out different blends and working on the material they were disappearing permanently from the menu.
I figured out that If use them and delete them from my BP somethings disappear completely.

This continued until I used all the blends and when that happened, the blends section also disappeared.
I tried other nodes and discovered it happens with others as well but not all of them.
Creating a new material doesn't solve the problem, the bug is global within the material editor.

The functions/expressions only return after a complete restart which is a relief,
however that means I lose 15 minutes or so every time I forget to hit undo to delete the function I placed and need to use it again.

In closing the behavior is this, If you delete a function in blueprint, some functions disappear from usage in material editor globally.
Sometimes they remain in the palette on the right but are gone from the right click menu.
If you leave and come back the palette will update and reflect the missing functions and you are screwed until a complete restart.
Using undo is the only way to prevent this and is not practical.

Thank you,