This is due to a bug in the base class TGroupBox that doesn't call the method Paint that we override when a VCL style is chosen. So, it falls back to the default appearance of a TGroupBox. Sadly, we haven't found a workaround around this VCL bug.
This is due to a bug in the base class TGroupBox that doesn't call the method Paint that we override when a VCL style is chosen. So, it falls back to the default appearance of a TGroupBox. Sadly, we haven't found a workaround around this VCL bug.