Got my car over 2 weeks ago and heard the chirp last night after I got home. Although I heard it's not bad for the car mechanically, it's however an annoying sound for a brand new car when it only has 204 miles on it.
So from what I've read:
1. Shell gas seems to be the workaround fix (for some).
2. There's a TSB for this issue to replace fuel but it doesn't permanently fix the issue.
Dear SUBARU, you need step up your game and find a permanent fix and issue a Recall. This is my first Subaru therefore it's not a good idea to leave a bad initial impression