Hhmm.... I've never seen a blend filter extend the bounding box like that before. And it does not extend the bounding box for me. But I don't have that font installed, so whatever I'm seeing here is not the same font.
Select that font with the large bounding box (or use the status bar to confirm that you have the right one) and do Filters menu > Remove Filters. Hopefully that will fix the bounding box.
This is a known issue, but is not currently recognized as a problem by everyone. I see it as a problem, myself. Anyway, if you move any object out of a layer which has a blend mode applied to it, the object will acquire the same blend filter, and carry with it to its new layer.
That's why it only happens when you move from layer Flores, which has the Multiply blend mode, to layer Anyaso.