Canonical URLs manufacturer injection issues

[Popandos]

But though seems that it haven't fixed in 3.0.11 which i have just downloaded. if($manId!==-1) line haven't changed... So i still need to update it myself. Thanks Pro for solution

[Milbo]

Thank you, yes my fault.
I added it at a wrong place (before the function, not in the function) it seems, so it was not always working correctly