Hi Jose,
Greetings from Syncfusion support,
We have validated your reported query and able to reproduce the reported issue from our end. We have considered the reported issue “Using the tab key to add new rows to the table replaces the rows with old table text” as a bug from our end. We will include the fix for the reported issue, with our May 18th patch release. We appreciate your patience until then.
Regards,
Indrajith