Recording of a test final match:1) https://www.youtube.com/watch?v=J3CmnegDKN82) https://www.youtube.com/watch?v=3i4V3iXc_vo3) https://www.youtube.com/watch?v=Y-XIE0b5yw44) https://www.youtube.com/watch?v=2_ELvF-sqMo
I suspect it's related to the HD tweaks, but I couldn't find where.
In SOD_SP, there's an option to enable this animation for enemy troops (but not for your own), but it doesn't replace the random animation, I don't know why.