Posted 21 January 2020, 7:54 pm EST
Please check the following link :
https://jsfiddle.net/fc6nqsdw/1/
use horizontal scroll you find that Header row reacts incorrectly.
**Also you have new release (5.20193.646) without fix this issue:
https://www.grapecity.com/forums/wijmo/flex-grid-search-problem-w