Form validation errors for matrix

I have a matrix where one answer is required per row.

When the user gets to the second line of the matrix, the form is popping up a validation error momentarily each time an answer is entered. Though it only flashes for a second, it is basically telling people they've made a mistake when they haven't (yet).

Is there a way to get rid of this? To users it will look like a bug.

That's the default behavior, if the users clicks outside the radio options, that will trigger the require message, since you have required an answer on every row. You may disable the required validation or just required at least one answer:

Let us know if you need more help.