Only original snowflake cones, axles and ball bearings seem to work on a snowflake mag wheel and Who knows if you adjusted them right or mixed Old and new ball bearings together because those are bit different in size. Most aftermarket snowflake mag parts are a little bit different in size, cup and cone angles and now your cups and balls bearing plating is missing, are worn/full of metal so you may need everything replaced including balls and cups and cones.
The best thing/only thing you can do is to convert it to sealed bearings with their sealed bearing kit on treats and or make a kit.
You need 12 mm sealed bearings, shim material, inside space tube and then of course still need 12 mm sealed bearing axle spacer, nuts etc.
Unless you use original puch OEM snowflake cups, cones, and nos ball bearings
It will happen again