Raspberry Pi Zero W wont boot with alpine-rpi-3.9.3-armhf.tar.gz. It keeps blinking 7 times, pause and repeat.

alpine-rpi-3.9.2-armhf.tar.gz on the other hand worked just fine.

No issues with the dowloaded file either:
$ sha256sum -c alpine-rpi-3.9.3-armhf.tar.gz.sha256
alpine-rpi-3.9.3-armhf.tar.gz: OK

(from redmine: issue id 10302, created on 2019-04-18)