Nostalrius Begins - Quality wow vanilla realm (1.12)

Spell: Battle Shout [spell=6673]

Issue description:

Using battle shout while being already affected by own battle shout does not refresh the spell into it's full duration. Instead a warrior with let's say 20s remaining of the buff has to wait until full expiration or manualy cancelling the buff and then use shout to get full duration.

Please investigate this issue further.

Thank you

Some people already mentioned this issue.
But they said something like it was bugged only with the rank 3 of the spell (and maybe further ?)

Can you confirm it is only rank 3?
When tested with rank 1, it is all right.

Also happens to me at rank 3 and did not before. I haven't yet reached rank 4+

I've only had the issue with rank 3

I'm 46 now, only had this issue in my 20s with rank 3. Speccing imp bs doesn't affect it in any way.