Imagine being a Russian soldier and your officer commands you to be the perfect target in a textbook ambush.
Just form a tightly packed column on a road with obstructions to either side, that has clearly been pre-sighted and gives great cover and concealment to the enemy.
Russian military tactics have never been heavy on well thought out maneuvers.
The standard Russian doctrine since… forever, has been throw men at the enemy until they run out of ammo and you overrun their position.
Rolling into an ambush is an extension of that tactic.