Summary: Horse Archers are not working like Warband. As "Charge" order is given, units proceed on the circle tactic, but they act like focused on one single unit all the time. So, as enemy cavalry or any units apart from the main line just distracts the Horse Archers and causing them to circle around that part of the unit. This results in them to crash onto enemy lines as their path just cross over. They also occasionally move through the enemy lines, especially main infantry line. They don't switch to melee and it can happen during any part of the battle. This causes lots of Horse Archers to tangle with enemy infantry units and get hit by friendly unit arrows.
How to Reproduce: Around 100 Horse Archers against any army will be sufficient to reproduce exact scenario.
Computer Specs:
OS: Windows 10
GPU: NVidia GeForce GTX 1080
GPU Driver Version: Latest
CPU: intel Core i7-8700 3.70
RAM: 32GB
Motherboard: ROG Strix GL12CM x64
Storage Device (HDD/SSD): 1TB
How to Reproduce: Around 100 Horse Archers against any army will be sufficient to reproduce exact scenario.
Computer Specs:
OS: Windows 10
GPU: NVidia GeForce GTX 1080
GPU Driver Version: Latest
CPU: intel Core i7-8700 3.70
RAM: 32GB
Motherboard: ROG Strix GL12CM x64
Storage Device (HDD/SSD): 1TB