Hi Niko,
Sorry for the inconvenience caused.
We were able to reproduce the issue while hiding the template column in virtualization mode. But we have already fixed this issue . A support incident has been created under your account to track the status of this issue and for patch update. Please log on to our support website to check for further updates.
https://www.syncfusion.com/account/login?ReturnUrl=/support/directtrac/incidents
Please let us know if you require further assistance on this.
Regards,
Mahalakshmi K.