Speedtree now supported with Progressive GPU Lightmapper in 2019.3 alpha?

Unity Engine
1

Have just been upgrading a test project where we were noticing that Speedtree tree assets produced very incorrect (almost corrupted looking) lightmaps when baking shadows onto a terrain or plane mesh in 2019.1 using the Progressive GPU Lightmapper (but baked just fine with Enlighten/Progressive CPU Lightmapper)
. The issue was still there in 2019.2 beta, but in 2019.3 the Speedtree assets baked their shadows perfectly fine to the terrain and test meshes with Progressive GPU Lightmapper.

Will this functionality be back-ported from 2019.3 alpha to 2019.1 and 2019.2 or will our production now need to wait for 2019.3 to be released properly? I have no clue how fixes are distributed between releases.

Filed a bug report for it here:
Case 1172347

2

Thanks Rob! The team was able to reproduce it: Unity Issue Tracker - Baked Lightmaps are corrupted when they are generated using Progressive GPU (Preview) Lightmapper

Although the issue takes a different shape in 2019.3, it is also not working as intended there.