plugin upload via rest and cloudify cli differs in behaviour

[fernflower]

Seen on: cloudify 4.3

Currently if you attempt to load a custom ubuntu-built plugin to a centos manager via rest api a PluginDistributionNotSupported exception will be raised, presumably because the check in rest_service.manager.rest_utils.plugin_installable_on_current_platform fails during distribution validation.
Although it's possible to load this very same ubuntu plugin to the manager using cfy cli.
Could you please justify this odd behavior?