Without seeing your config it's hard to say why this might happen. (Right click "ISBoxer" at the top, select Copy to Clipboard, then it can be pasted on pastebin.com for example and linked back here)

The only thing that happens as a direct result of switching is what is configured per Slot in your Character Set, "when I switch to this character...". If it's set up to do a Mapped Key, and that Mapped Key enables Repeater, it'll enable Repeater. Otherwise pretty much impossible.