Avast's new version wreaks havoc with sandboxie.

This is sooooo annoying… Avasts Web shield is constantly blocking certificates this only happens when im browsing in the sandbox.

Yes,

Already been reported and answered what you can do for now https://forum.avast.com/index.php?topic=167238.0

Greetz, Red.

its very frustrating that they didn’t fix the problem yet. :-\

They are working on it.
Keep in mind that it not just a matter of changing one or two lines in the code.
If something is changed it can make something else to malfunction.
So it will take some time to come up with a solution.
Just have patience.

Its already fixed guy. just update the program.