had a match recently vs. GG and IM46. IM fired yellow, GG fortified. i fired a power above the threshold, IM did not take damage, but none of the yellow countdowns were removed, either.
i’ve had similar experiences, except it was my im46 who fired house party protocol and the the yellow cd’s weren’t fortified. the enemy 5* thor fired his green and red and the cd’s still remained on the board. so i think it’s just im46 that is bugged and the fortified tiles are unrelated.
Hm. Both of those powers do damage in the (base, plus extra damage per whatever) format. MPQ has frequently had trouble treating this damage as a whole instead of each part separately. I wonder if the base damage for those powers is under the House Party Protocol threshold, but combined with the additional damage per tile would be high enough.