Check your wheel bearing races havent moved or the split ring gone, I had one move from its seat and it allowed the bearing race to migrate slightly causing play. There is a possibility that your new bearings could already have failed too…again I have a brake side pro 2 bearing go within a couple of weeks on the brake side (running 180mm rotor) on Rev fork.
Sometime a bearing can be damaged on being installed. Depending on how they were installed. Just a thought. Also the bulb hub should have a sleeve in between the bearings. Was this put back in when the bearings were changed? Again just s thought. The end caps combined with the inner race of the bearing and the spacer tube effectively create a continuous axle so as long as all the parts are present and the axle it tightened sufficiently the only thing it can be is a bearing failure.
I have a 20mm maxle on my revs and a bulb front hub. bearings were changed not too long ago but have noticed a massive amount of play in the front wheel all of a sudden, tightened up the maxle some more and it got better, tightened as much as a dared and didn’t improve. can maxles develop play? do they need replacing?