When adjusting the column widths of a standalone or attribute table in ArcGIS Pro, the table view shifts back to display the selected and/or current feature.
This bug was fixed in ArcGIS Pro 2.0, now available online.
解决办法
Ensure the record to investigate is selected or is the current feature (the row with a bolded blue line in the gray cell on the left) before adjusting the column's width.