As soon as the user starts interacting with the content in the grid in MUX, such as opening a project grid and returning to the list view, or opening the "Detail" tab, the firsts two or three columns switch positions between the panes.
Steps to Reproduce:
Expected Results: The pinned column position should be honored while working on the view and state of the view is unsaved.
Actual Results: The issue occurs when certain columns in the list view are pinned to the left and the Details (or Columns) panel is opened, such that the combined width of the pinned columns and the Details panel exceeds the browser window width. This can also occur when the browser window is resized and the width of the pinned columns alone exceeds the available window width.
Clarity All Supported Versions
DE181286
The grid width shrinks when resizing or opening the details flyout, causing some columns to unpin based on available size. This is the default behavior of the AG Grid library. It is designed so that pinned containers remain fixed while the single horizontal scrollbar at the bottom controls the central, non-pinned columns
Potential Workarounds:
The way grids work currently is working as designed