Hi Michael,
We are unable to reproduce the problem at our end. We have prepared a sample that can be downloaded from the following location.
Please share the following details to analyze the issue and provide you solution as early as possible.
1) Code example of Grid and events used (if any)
2) Stacktrace browser console
3) Version of the Essential Studio
4) Replication procedure for the issue. Are you trying to add/edit the Grid in hidden tab or second tab even in its hidden state?
5) Name of the browser and its version
6) If possible, reproduce the issue in the attached sample and send it to us.
Regards,
Seeni Sakthi Kumar S.