In my Drupal project I have a yaml configuration file which contains an id with the value
16_9 (more precisely it is part of the Crop module configuration). When checking differences between the active Drupal configuration and this staged one, Drupal lists this config, although it should be identical:
As you can see, the YAML parser processes the id as an integer and stripes out the underscore.
This problem only exists in my Drupal-VM. In our testing and production environment (non Drupal-VM) with the identical code and data base the config sync is fine. It does not show any differences.
There might be different YAML parser (and/or extensions) in use which behave not the same way. But I don't know if this is a Drupal or VM issue. I don't think that it is specific to the Crop Module.
VirtualBox .1.18 r114002 (Qt5.6.2)
Drupal VM 4.5.0 (with Ubuntu)