Cutting caption selects for editing the wrong side of the cut

When cutting a caption with the "Add edit" tool, there is a workflow problem or bug.

After the Add edit, the left side of the cut appears selected for editing. But as soon as you start doing text changes, the selection unexpectedly switches to the right side of the cut. You end up doing the opposite of what you were intending to do.

For example I cut the caption "I ate an apple. It was good." in two.

The result is two captions with both lines. I want to remove one line from each to get "I ate an apple." and "It was good".

The left side appears to be selected. Therefore, I remove "It was good".

But as soon as I change text, the selection silently changes to the right side.

At this point, I have a left caption with the text "I ate an apple. It was good." and the right caption with  "I ate an apple."

It is the opposite of what I was intending to do.

Please make it so that after and Add Edit to split captions, the left side of the cut is selected for edit and stays selected.

Or at least, show that the right side is really the one selected to avoid confusion.

Thanks!