Problem with blocking on Expeditions

Handle: zygotes
Country and time zone: UK GMT
Date the problem occurred: 21/01/2024 (and other times)
Time the problem occurred: 11:30
Player level: 80

OS: Windows 11 x64
Browser: Firefox 121.0.1

When blocking on Expeditions, the first attacking unit on the boss camp is incorrectly selected. This happens maybe 1 out of 3 times. I was beginning to doubt, thinking maybe I had selected the wrong unit type myself, so I made a video which shows that I selected cavalry but bowmen attacked instead. As a bonus, the game also crashed shortly after the attack started.

Video of the issue: https://youtu.be/SGOmEnbyeeU