Add items doesnt work if you check "edit not allowed" under roles

Under Roles / Groups, you can define which folders have read or write access.

There are also two specific permissions for entries:

• Delete not allowed

• Editing not allowed

When I set:

• Write allowed

• Editing not allowed

I’m unable to add new items to the folder.

Is this expected behavior?

My goal is to allow users to add new entries, but prevent them from editing or deleting existing ones.