'Completely healed' is tough to quantify. It was 30 years ago and I can still make the ankle 'crack' on command when I rotate it a certain way. Not painful, but loud.
FWIW, I was taking a break from riding during college, so I did not test it that way.
My theory is that circulation is poor to the ankle, so it takes longer to heal up.
The healing time was extremely frustrating. I'm convinced I would have healed faster if I had stayed on crutches 8 weeks instead of 6, but I was young and in a big hurry not to be on crutches anymore.
I basically did everything wrong, and mine was still annoying me a little 12 months after injury. By 15 month after, I would say I was 100%
Here is what I did wrong: At six weeks, I threw my crutches away, and walked a few blocks that first night. Very bad idea.
I could walk normally within 3 months or so, but even a slight mis-step hurt for 4 -5 months. Then at six months after the break, I stepped on a telephone my roommate left on the floor, twisted it bad, and nearly went back on the crutches.