Most common here is an overtightened skewer on those axles. Rule that out first.
You may also have hubs that someone put Ti axles in, which do bend a bit under an overtightened skewer.

Determine if they are the sealed bearing (part of a DA wheelset) or ball bearing (hubs alone).
The hubs are different from the 7400 series, but not that different from the 7700 series.
(Note the DA7700 hubs are not the same as found in the WHS7700 wheelset)

Either way, should not be a ticking on the front hub.
Best way to check is without load, or on a stand.
Then localize it to one side or the other if possible.
I'd put the wheel on your hand, palm up, and spin it, reverse and repeat.
Any ticking due to a hub issue should present when one side is up or the other.
You can try lubing the dust cap circumference, but there may be a slight crack in the dust cap or something.
I don't mess with hubs other than to rebuild them as scheduled or noticed.

That's all I know and I'm sure no expert. Others here will chime and show me as wrong. They always do.