If you mean that you are measuring 21-23V across the coil when energized, then NO that is not "normal".
Assuming nominal conditions here. You aren't seeing some artifact of pulsed/switched drive current, etc.
And assuming you mean "steady-state" and not some kind of transient when powered or released, etc. etc.
However, It is hard to imagine how this symptom (however atypical) could have caused any change in how the unit is performing?
?
You question only raises a dozen more questions.