Many different things triggering twice sometimes [Fix in 2.9]

Grixis197

Seen this quite a bit will give some e.g. if a treasure gets triggered sometimes it only triggers the mana once sometimes it’s two times, some supports at beginning of turns trigger twice other turns it’s the normal one, and another is Koth ult whenever someone matches red sometimes it gets triggered twice so creatures get 8/8 but again it’s fine other red matches so a strange old bug where stuff happens twice idk how to be more specific with this anyone else seen this with some cards. Also Haggar Walker sometimes gives you 2 thopters even with a single 3 match many cards seem to have this problem.

Azerack

I've seen Molten vortex do this, as well as a treasure getting tapped it goes off at least twice like it's a firework or something.

I can't pin down when/why, either, but I can vouch this behavior is out there.

DBJones

I've seen the double triggering most often when a support is involved in the match for Koth. Any support, not just his. The treasure one seems to happen with reinforced treasures.

Monkeynutts

I just lost to Koth where he had Firesong and Sunspeaker out.

He's Koth.... he can't cast white spells...yet every turn i took 3 damage and so did my 1st creature...EVERY turn until I killed it.

Tombstone

Hi Everyone! This should be fixed in 2.9.