Auto-translated
There's nothing funny about this.
When needed, the file is there. When it's not needed (it interferes with the wizards casting haste during battles with titans; they always cast stone skin, and the battle, if not lost, definitely doesn't go as planned. And the snipers don't get lucky), it disappears. And then it reappears – when recording a video with griffons. And disappears again – when recording the second video.
It's impossible to do this unintentionally.
P.S. By the way, five lucky shots in six turns remain unexplained. "I searched for a long time and finally found it" won't work as an explanation.