Shadow rendering issue with transparency

Yes - see here. I just did not get around to integrate this improvement.

It is configurable. You can set it to be on or off by default in application settings / Views / Shadows visibility.

There are some limitations.

Transparent surfaces don’t cast a shadow, so even if you set your opacity to 99%, you won’t see any shadow casted by that model. This can be considered either a feature or a limitation (it may be useful in some cases).

Depth peeling does not seem to work when shadows are enabled. This can be probably fixed, but most likely would need dedicated funding sent to Kitware.