Here is a video of what happens when I try to create a project inside a uniquely-named subfolder.
This worked fine in OmniFocus 1.
I’ve been submitting bug reports on this since 2014, when OF 2 came out and broke Quick Entry. Eventually I gave up and decided to wait for the next version.
One example of the feedback I got when I reported this:
Thanks for getting in touch about OmniFocus, sorry for the trouble you’re experiencing! Checking the development database, we have this filed as a regression from version 1 - I’ll attach your email to that item in the development database so the rest of the team will know you’d like them to get this work onto the development schedule as soon as possible. Sorry for the inconvenience in the meantime!
Well, it’s still broken, it’s a regression from version 1, and apparently we’re not interested in fixing it for version 3?
A couple of the bug report IDs, from my email: