Experienced it twice in four games. Played skirmish twice and tdm twice - got it once in each game mode. Seems like the hotfix should be expedited or someone's hearing is seriously getting damaged. Rip unsuspecting headphone users with their sound turned up listening for footsteps and horses.
The line moves with the whichever troop is glitched:
OS: Windows 10 Pro
GPU: RTX 2080 Super
GPU Driver Version: 456.71
CPU: Ryzen 9 3900X
Motherboard: ASUS Prime X570-P
Storage Device (HDD/SSD): Samsung 860 EVO Sata