Coming up out of posture may be a necessity to hit good shots

If you struggle raising up out of posture from time to time, it might be because your swing calls for it. If someone has a steep downswing, it may be a necessity to raise up to avoid hitting overly fat shots. To see if you qualify, check your transition and swing plane.
If you are steep, try flattening out your transition so you can increase tilt and feel your rear and pressure go back toward the heels.