I recently started a new Trellis project, using bedrock as well, and noticed that assets were loading slowly and that when CSS was injected with BrowserSync, it would take 5 seconds for them to show after the initial notice (and compilation) had taken place.
The only configuration option that shows 5000 as an option is the Socket heartbeatTimeout
https://browsersync.io/docs/options#option-socket.
So what are the differences between the current Trellis version 0.9.9
and the previous 0.9.8
that might cause this? https://github.com/roots/trellis/blob/master/CHANGELOG.md
I’m thinking it might be a web socket issue with NGINX.