Doesn’t look thermal problem, when sequential tests 1,2 are bad 3,4 are good
6 hours later sequential tests 5,6 are good and 7-9 bad again.
When test media outer edge tends to be miserable and in next test may be close to excellent, looks like disk reading is mishandled somehow.
Which never happens to Panasonic MEI
Sony Ritek has been also “stable - poor +/- 10%” as scan above in this posting.