Hi ToDo,
Thank you for posting query to us.
I am afraid that I was not able to reproduce the hidden issue in the below sample.
http://websamples.syncfusion.com/samples/Grid.Windows/F69522/main.htmPlease have a look at the sample and if still the issue exists, could you please elaborate the reproduce steps so that we could sort out the cause of the issue and provide you a solution?
The logic for handling hidden columns has been changed in our code base to increase performance from version 4.4. A static property UseOldHiddenScrollLogic property has been added to the GridControlBase.
GridControl.UseOldHiddenScrollLogic = true;
Please try this and let us know if this helps.
Thank you for using Syncfusion Products.
Best Regards,
Jeba.