Just to make sure I understand the steps to reproduce:
A team with Frostfeather and hero with Backup trait
Kill Frostfeather (or wait until Frostfeather killed if playing defense)
One of 2 things will happen:
a) If no backup summoned, Frostfeather will freeze all troops on opposing team
b) If backup summoned, no freezing will occur.
I wonder if this happens for any other “on-death” trait (like Lust) and any on-death summon. Should be simple enough to test out. Will see if I can get screenshots.
EDIT: Good news is that I managed to spawn bandit on first try. “Bad” news is that Frostfeather did freeze everyone.
That would be more difficult to test, but it should behave the exact same way as pictured above. If you manage to get screenshots or video of it happening, I’m sure the Devs will look into it.
… You are absolutely right. Never thought of killing my own units. Keep forgetting there are units that do that. But apparently @Dust_Angel has already spared me the trouble of testing it out.
My guess, you happened to be facing a team that had immunity to freeze OR that they cleansed shortly after (e.g. if Queen Beetrix killed your Frostfeather but also matched 4 (I don’t know if the cleanse would trigger before or after Frostfeather’s freeze but that’s another issue entirely)).
Firstly, I want to apologize for dismissing it. But not only did i replicate the bug, but narrowed it down. And it gets weirder. (Not sure how to film on mobile so apologize in advance for screenshots)
When Frostfeather is in 1st slot. It behaves as expected, even when a bandit is summoned:
EDIT.
With some more juggling troops around - whenever Frostfeather is above Hero freeze activates; when Hero is above Frostfeather freeze activates only if Backup does not trigger.
Right, I forgot about top to bottom traits. I forget to the point where I’m surprised about which storm shows up because of the order of troops. This does explain why I’ve only ever seen Frostfeather on first slot.