QTableView selection changes after modifying values in sorted table

i. Let's have a table with multiple columns and rows with sortable values(eg. numbers).
ii. Lets sort the table by random column.
iii. Select row.
iv. Arithmetically modify values in that selected row (eg. clicking custom button outside table)

Now I would expect the same line/items will remain selected and moved to the appropriate position but the selection changes to more/less RANDOM.

Without sorting and when is the line not being moved (do yo sorting) it works fine.