The article claims it is 20-30% in quite limited circumstances, and less if you include "we know it will fail" sorties. And seemingly entirely disabled by jamme

The article claims it is 20-30% in quite limited circumstances, and less if you include "we know it will fail" sorties. And seemingly entirely disabled by jammers, where available. I guess they must be working for Ukraine, or it wouldn't be buying them. But how well they scale against a competent opponent is less clear.