Hugo server doesn't watch content anymore

For some reason, in the middle of nowhere, my next invocation of hugo server stopped watching the content subdirectory. Here’s a typical output:

> hugo server -Dvw
WARN 2018/07/03 22:18:26 No translation bundle found for default language "en"
WARN 2018/07/03 22:18:26 Translation func for language en not found, use default.
WARN 2018/07/03 22:18:26 i18n not initialized, check that you have language file (in i18n) that matches the site language or the default language.
INFO 2018/07/03 22:18:26 Using config file: site\config.toml
Building sites … INFO 2018/07/03 22:18:26 syncing static files to site\
INFO 2018/07/03 22:18:26 found taxonomies: map[string]string{"tag":"tags", "category":"categories"}
WARNING: calling IsSet with unsupported type "ptr" (*hugolib.MenuEntry) will always return false.

                   | EN
  Pages            | 35
  Paginator pages  |  0
  Non-page files   |  3
  Static files     | 94
  Processed images |  0
  Aliases          |  0
  Sitemaps         |  1
  Cleaned          |  0

Total in 145 ms
Watching for changes in site\{layouts,static,themes}
Watching for config changes in site\config.toml
Serving pages from memory
Running in Fast Render Mode. For full rebuilds on change: hugo server --disableFastRender
Web Server is available at http://localhost:1313/ (bind address
Press Ctrl+C to stop

Notice how it says Watching for changes in ... {layouts,static,themes}. Previously content was also usually listed there, but now it suddenly isn’t. I haven’t changed anything, just kept editing the content files, and had to restart the server once, and now all of a sudden watching doesn’t work.

Notably, Hugo still generates all the content correctly when I run it in standalone mode, it’s just the watching that’s broken.

System info:

Hugo Static Site Generator v0.42.1 windows/amd64 BuildDate: 2018-06-13T10:17:09Z
Windows 10 Version 1803

I confirm. 42.2 also does not update the page after the changes, it is necessary to press f5 each time.