try tightning the bearing mounts cause i had sort of the same problem and i just tightened them and the problem went away so that could be your only problem
o and maybe it is the spokes cuz when you sit donw its putin weight on the spokes maken them bend/move around a little.When you have the uni in hte air there is no weight on the spokes maken them do that.
Could the lips of the bearing holders be rubbing on the Profile spacer washers? Maybe one of the washers has a little nub that’s sticking out and hitting part of the bearing holder every revolution.
Are you using the big conical shaped saucer spacer from Profile? That spacer can have some clearance problems with some frames and it could be rubbing on the frame. You can get additional small spacer washers from Profile so you don’t have to use that big spacer thing.
This has happened on 2 of my profile wheels. Both times it went away quickly, but then cam back when I rotated the cranks, possibly because the spacers moved too.