The new feature "Data-Driven Blocks" has a few issues lately I know, but I want to report this one because it's not being noticed.

Let me explain the issue first in Blockbench. You can edit a cube's pivot point in Blockbench, which is in Blockbench; the models is perfectly rendered/shown in the preview without seeing any errors in the whole model itself. (see attachment below)

The problem occurs when a Custom Block that uses pivot points are placed.
Some parts of the Custom Block that has pivot points are unaligned and off centered from its pivot point.

The same problem applies to all models that has complex pivot points applied.

It's kind of hard to explain, so make sure to check the attachment(s) below.