Spawn Protection not working

Hey there πŸ™‚
Since the new update Tusk Force, I have noticed several times that Spawn Protection is not working properly.
Example:
I respawn and receive an APDSFS round after 2-3 seconds which damaged multiple parts of my tank. Right after that the enemy tried to mark me with his machinegun, but then the spawn protection marker is displayed above him and I don’t get any more damage.
The same problem happened in another match to an opponent who complained in chat about missing spawn protection.
Is there already a known error/problem or is it due to some settings or something completely different?

Grettings from Bavaria! πŸ˜‡

Are you sitting still or moving for those couple of seconds?