early kailh box seems to have had that same problem, the stem was too think because the original buyer (a keyboard company do not remember which) had looser keycaps so asked for larger steam, that broke SA and GMK keycaps, they retooled and i would be hard pressed to still find those sold, maybe Gateron had a similar issue. Cause yeah i have not had problems with my silent red, green or browns (all Gaterons)