QTableView span gets confused with logical indexes when columns are moved

When a QtableView has a row spanned and when one of the columns is moved, it is not behaving correctly. Please refer to the attached sample,

In the sample, Row 3 is spanned to all the columns and when column 1 moves to position 2 and try to fix the spanning again, you can see that on selecting column 1, the contents of row2 is not visible completely, as it is covered with selection color of column1. The reason seems to be the index for row2 and column 1(i.e. now on 2nd position) has column-span 1, whereas it should be 4.
Attaching the snapshots for before and after column move.