Wolves summoned using repeating command blocks, will cause the wolves to make the noise to indicate they are hurt even though they are at full health.

Command used: summon minecraft:wolf ~ ~1 ~ {Owner:player}

-Doing /summon minecraft:wolf ~ ~ ~ {Owner:player} in chat does not reproduce the same bug, only in command blocks.

-Using the NBT {Owner:player} seems to cause the issue.
-summoning regular wolves Doesn't cause the bug.
-Leaving and Rejoining does not fix the issue.
-It only fixes it when you heal the wolf after its taken some damage.
-Regular Command Blocks also cause the issue.

 -vaum