Ok, here’s the fun part.
15m ago, once server restarted, everywhing was working fine. 10 minutes later, --watch was not working again.
And the problem is … that i’m also running a seafile docker container on the same folder, watching for changes and uploading the modified files on a remote seafile server (so hugo watch was working until i restarted that container !).
If i stop that seafile (cli) container, then hugo start to see the notifications again.
It’s like if the notifications were only able to be sent to either the docker container, either hugo.
The weird part is that the seafile container is configured like that for months, and until recently, this wasn’t an issue. Maybe something has been altered in a recent docker version, i don’t know.