In repeat grid with options "Expandable rows" and "Override default template", when user adds row by action "Add item", customer's template is replaced by standard "pyGridRowDetails" template instead of what was chosen by them.
STEPS TO REPRODUCE Create repeat grid.
Enabled expand multiple rows
Enabled override template in operations tab
Click on live Ui and trace it
The template called in override template will not be called on enabling expand multiple rows
Found related post in pdn please refer below for the same Hot fix is available V7.1.7.