Repost - Cursor Jumps to the End of Text Fields

Reposting due to insufficient answers and to provide a possible (temporary) solution.

TLDR; type what you need to type at the end of the field and then copy & paste it where you need it to go.

When filling out information in some text fields - for example the name entry fields on ancestry.com - if I need to add or change something in the middle of the field, I move the cursor to the position needed to add or change what I need to. Then, after typing one letter, the cursor jumps to end of the field. It wasn’t doing this until this last week, and it’s truly obnoxious. I guess my question is, is this a setting that I can turn off? It isn’t happening in this field I am typing in currently. I have attached the following image as an example of what it is doing. I typed Joseph “Jumping Joe” and then realized I needed to add Anthony after Joseph and before “Jumping Joe” and this is what happened. Only the “A” was inserted before the cursor jumped to the end of the field.