That happened in the 1800s and very early 1900s. US dictionary makers favored phonetic reform. -IZE has been standard since the 1920s.
The last time this came up on HN, the comment thread already disagreed on whether "mention" should be spelled "menchin", "menshin", "menchun", or "menshun".
a spelling reform cud[] keep “mention” and still significantly improov the orthography wer it to simply aply the rules more consistently. And when wurds ar genuinely different, like “ask/aask” or “uv/ov” it's not going to hurt to spell them differently.
[] although how to spell put/putt is an open question. here I have sided with northerners and decided to spell them the same.
[As an aside, why did you drop the doubled "p" from "apply" but not the doubled "f" from "different" or the doubled "l" from "spell"?]