Incorrect column resizing while multiple columns are selected

For example, I click on the heading of column A and drag the mouse to the heading of column C. After that, I am trying to resize a column in a non-selected area, for example by resizing column F to 200 pixels, and all the selected columns (A-C) and column F have changed their width by 200 pixels, which is an incorrect result. Fully selected columns should change their width in the same way, only if I try to resize the column inside the selected range. Also function onresizecolumn returning array of selected columns [a-c] instead of column f which was an aim of resizing. So my question is there any tips to fix this moment?

Reproduce the issue by selecting columns A-C, then resizing column F, and inspect the column-selection and resize handling around the onresizecolumn callback. The fix is complete when resizing outside the selected range changes only the targeted column and onresizecolumn reports column F rather than A-C.