Build: 38862
Platform: Steam
OS: Windows 10
Issue: Hand-to-hand units are able to attack and damage enemies completely surrounded by walls.
Attachments:
By assumption, there seems to be a pattern. All long-ranged melee units may be affected:
- Chariot → Scythe Chariot
- Hoplite → Phalanx → Centurion
Keep the good work, friend! You should create a topic with links to all the bugs you have found and may find the future!
But as a compensation the villagers can repair through the wall ^^
Do you have footage on this!? If so, can you please share it here? 
This bug is still present in build 46777. A chariot and a cavalry started inflicting damage to a tower behind a stone wall!
I also discovered it is actually possible to reproduce the issue. Simply command a melee unit to attack a tower that’s surrounded by walls.