[Rendar]

I could be wrong here, but I believe Bear Bash has the same issue of ignoring KB immunity despite it not saying it should.

Bear Bash

Cost: 10 FP / 3M

Target: Enemy Only

Area: Single

Range: 1

Cooldown: 3 Round(s)

Targets an enemy within 1 Range and deals 150% Scaled Weapon Attack damage to the target as Blunt damage, which can critically hit. If it hits, the target is knocked back 2 tiles. If the target was within 1 Range of the user, the knockback is increased by 2 tiles and can't be prevented.

Bear bash bypassing KB immunity is by design.