Combat, AI behavior, AI Hydras should not move and attack all adjacent troops by staying in the same hexes (0.9.13)

[LeHerosInconnu]

Preliminary checks

• [X] I've checked that there aren't other open issues on the same topic.
• [X] I've checked that this issue is reproducible on the latest snapshot build.

Platform

Windows

Describe the bug

In fheroes2, AI Hydras should not move and attack all adjacent troops by staying in the same hexes.

In fheroes2:

https://youtu.be/F-lkeJvD9v0?t=15790

Related issue: https://github.com/ihhub/fheroes2/issues/4131.

Save file

Not needed.

Additional info

Version 0.9.13