Since the introduction to .local domain in LBFW, when using gulp automation with browsersync proxy causes around 3-4sec delay during refresh after saving.
From the stackoverflow link , it seems to be caused by - Bonjour IPv6 lookups being issued for certain DNS lookups on .local domains. These IPv6 lookups create a timeout delay until the original IPv4 DNS lookup is issued.
Temp fix was to edit the hosts file with ::1 yourwebsite.local, hope the flywheel team can take a look in this for a better solution. Thanks!