Try to delete the affected file from the AssetPackeges folder and do the verifying in steam again.
C:\Program Files (x86)\Steam\steamapps\common\Mount & Blade II Bannerlord\Sounds\PC
-Delete all the .bank files in there.
They're planning to change this on the new roadmap
• Updating the system of battles: - Dynamic regulation of the distance between teams before the start of the battle.