Distances not lining up with ball speed and launch angle?

I’ve been experiencing issues with the Approach R50’s carry and total distance readings. It appears to underestimate my shot distances by approximately 15-25%. I ran some basic calculations using ball speed and launch angle to calculate carry distance, and they don't line up, nor do the r50's values align with my typical yardages. If the accuracy cannot be improved, I may need to consider returning the device.