Thanks for your attention.
Now I double checked and yes, it seems according some 100's of reports received about this model, the Value / Worst fields are always very low for the Hardware ECC Recovered attribute. In most cases both are 1 and in "best" situation these can be 2 or 5 (still not high).
So it seems the low numbers there are typical for this model.
This alone does not indicate problems: this attribute can never trigger error (as the Threshold is 0) but I agree that it's interesting.
However, other users did not report any similar (when the drive was 100% perfect) what you wrote. Personally I'd surely check cables, connections (just to be sure). From the list of attributes, I see no signs of cable/connection problems but I'd check just to be sure.
Also the driver of the controller (or the motherboard chipset) can cause some minor compatibility/timing issues, so I'd check that too and may update driver if possible.
If you use Report menu -> Send test report to developer option, I can also check the current driver and this may also give some ideas, thoughts.