version 2.5.3 (295) on El Capitan
I don’t really know what to call this, but when I create a new record or edit an existing record, text is automatically filled in for me whether I want it or not. Let’s assume that I want to change a URL from http://amazon.com to https. I click just after the “P” and type “S.” As soon as I do, a drop down appears with a handful of entries and the first one automatically is entered after the “S.” So as soon as I enter the “S” the field is now https://chaseonline.chase.com/://amazon.com.
Similarly, if I am entering a new URL as soon as I type a non-alphanumeric character the first entry is auto-entered. I can see no way to stop this from happening!