I have just the opposite problem and I work hard to tongue more distinctly and clearly concentrating on pitch. It might help you to practice legato without breaking the tone and keeping the breath even for awhile. I don’t know if anyone else uses this approach, but when I discover a tendency I don’t care for, I sometimes try something exactly opposite and on occasion it works. In the case of changing the tongue, I’m paying a little more attention to a sharp attack since my tendency is legato or slur (i.e.I find it easier) – it seems to help me sometimes, ha. I absolutely think worrying about where the tongue is (position) when playing is useless unless you contact the lip and change pitch as long as it doesn’t interfere with other aspects, let it loose.
Rod