Problem upgrade DBPlanner from 2.2 to

After the upgrade from DBPlanner 2.2 to I have found several problems with the graphics.

I attach two screenshots where you can see the differences.
In the section of not available times (from 7am to 9 am) you can see a thin white linea and part of the column separators which were not presents in the old version of the component.
How can I fix it?
Old version:
New version:

It is unclear what is causing this. With a default Planner we don't see any painting issue.
We'd really at least need to know your property settings and event handler code to be able to reproduce this. Please send this information via email to support.

I just sent an email to support.

Best regards.