[aur-general] Co-maintainers not receiving flag-out-of-date notification mails?

Hi AUR enthuasiasts, I'm the co-maintainer of depot-tools-git. [1] Two weeks ago that package is flagged as out-of-date, but I didn't receive any notification mail - not in Spam either. For other packages that I'm the only maintainer, out-of-date notifications are well sent. Is it an aurweb bug or just an accident that my inbox losts the mail? Thanks, Yen, Chi-Hsuan [1] https://aur.archlinux.org/packages/depot-tools-git/