This is a Site Studio bug that occurs when there are "nested" components inside a view's template that uses component dropzones.
For example, let's say you have an "outer"
Component that contains a
Row for Columns and inside that a
Component Dropzone. You also have an "inner"
Component with a
Column containing another
Finally you combine those two Components in a
View Template where you drop a
Pattern Repeater in the "outer"
Component Dropzone, the "inner"
Component inside the
Pattern Repeater, and a
View Item inside the "inner"
While the structure you have created is completely valid if you skipped the use of
Component Dropzone, with them in place the resulting view will render unexpected results (e.g. the first item multiple times).
Any Site Studio site using a setup like the one described above.
This bug has been addressed on version 6.4 of Site Studio.