2-sided mat with roughness AND adaptive dome = problem

[Mnietek2707]

2-sided material, some glossy reflect, some roughnes, scene lit by HDRI dome light with "Adaptive dome" ON.
This combination causes visible bucket borders in render.
If material is not 2-sided or there is no roughness or "Adaptive dome" is OFF - then there is no problem.

[hermit.crab]

Could you send the scene to support@chaosgroup.com so we can take a look? Mention this thread in the e-mail along with your V-Ray and host platform versions.