Wolves attacking don't deal damage a lot of the time when they lunge, I had to intervene because my wolf in wolf armor couldn't handle a single mob.
Steps to reproduce:
1. Summon wolf
2. Hit wolf in survival
Expected result: wolf hits every lunge or once damage immunity is up
Observed result: Wolves often do damage every few seconds, or not at all
I am surprised that no one else has mentioned this issue. Ever since they fixed the bug which restrained wolves from lunging in bedrock edition, their combat capabilities actually worsened. Because now, every time a wolf lunges when attacking, it seems to have forgetten what it has been doing for about a half of a second before refocusing on its target.