I have been experiencing this bug for more than six months. It is not that common indeed but it's more than just annoying occurrence. Last season I lost a game 3-2 versus a weaker player who scored 2 'double corners' and one regular. A few minutes ago, again a weaker team, scored two times from doubling and eliminated me from the Cup without even being active. Moreover, of course, there are many games in which I concede a double corner goal but it doesn't neceserilly affect the full-time winner. Even counter-attacks often end up with a corner which immediately turns into a header and a potential goal. It is strange how rarely I get double corners and how often I concede a goal because of this bug. Maybe like 1/5 of my total conceded goals during the season are due to illegal headers.
Greetings,
Squad of Bunnies L7
Chelsea F.C. L5