Please report bugs to Oracle via your MOS account.
The forums are NOT the place to report them but are to help people with problems they are having USING functionality.
I was addressed here from the Database Utilities space, where I was told this would be a better place to address the issue.
I looked around my account's options trying to find the suitable place to report this issue. I found none better. If your support protocol and community web design turns out to be deficient it's not really my problem.
I've dedicated enough of my time trying to report what it seems to me an important functionality error in one of your key database tools. I don't have the will or the inclination of start bouncing from here to there trying to find what you consider to be the suitable recipient for this information. Use it as you consider best, that's as far as my contribution gets. And if it applies, you're welcome.
known bug, i believe it's fixed for 18.3
SR's with MOS are the same for SQL Developer as any other product
Sorry you feel like you are being bounced around but MOS is the channel for ALL issues when you need direct support from Oracle
Just log in to your account and submit a service request.
There are also facilities to search to see if your issue has already been reported and/or addressed.