Not dosing won't harm. The AOB will survive just fine. However, I think your nitrite is being used up as fast as it's produced (i.e. you're at or near the nitrite peak), so dosing 1ppm ammonia will, at worst, take the nitrite up to 5ppm, and it should then continue to hold or start to drop. So I'd compromise and dose a 0.5ppm if you can, just to give the AOB something to nibble on.
What's your nitrate reading?