Hi Asdf,
Greetings from Syncfusion.
Query: Columns are broken when using the checkbox selection and frozencolumns at the same time
We have validated your query with the provided sample. You have used Grid Detail Template with frozen columns feature. We would like to inform you that the Detail Template feature is not supported with frozen rows and columns feature. So the reported behavior is occurred. Find the below documentation for your reference.
Reference:
While removing detail template from Grid in the provided sample, the Grid is rendered properly with frozen columns with checkbox selection.
Please let us know if you have any concerns.
Regards,
Rahul
