The service status reported by the hint message is not correct (it is reversed), while the service list columns show the correct status.
As an example, when starting ntopng service a hint warns about the service being enabled but not running:
# systemctl is-enabled ntopng
disabled
# systemctl is-active ntopng
active
yes you’re right, the label description is wrong.
What do you say we change it into:
“The service is enabled but not running, or the service is running but the service is not enabled”
?
The service is running but not enabled.
Yes, but there is only label error which applies to both cases. Basically the error raises if the is-running and is-enabled differ.
So what error label is the best match for all cases?
Well this is basically wrong, it should be two labels then. 
But since there is one, I guess this fits:
The service is either not running or not enabled.