The bug has been there since the initial release of Unity 5.3 in december.
SpeedTree integration is one of the most important parts of Unity but it has not been fixed after all these months.
What’s going on? Games can’t be published with threes looking like this:
I’ve sent you a PM.
The ticket was opened on April 11th but I’ve noticed the bug since the 5.3 release and other people seems to have encoutered the bug since then as seen on the Speedtree forums.
I have got to question why you don’t just convert the textures to PBR by default? If I can do it in an hour via substance tools or ShaderMap (remove all lighting info etc. / generate new maps). Then what exactly is the issue?