We are unable to reproduce the issue at our end. We have prepared a sample with an icons at the top of the Grid and checked for any alignment changes between Grid and icons with and without the Grid data. The sample can be downloaded from the following location.
Please provide the following information to analyze the issue and provide you solution as early as possible.
1) Screenshots for the issue
2) DOM structure of Grid page as shown below
3) Code example of Grid along with the rendered icons
4) If you are using any custom css for the Grid page, send it to us
5) If possible, modify the attached sample to replicate the issue and send back to us
Seeni Sakthi Kumar S.