iTunes Error correction is BROKEN!

Not only is iTunes Error correction BROKEN, it apparently has been (at least at times) since at least 2010.*

I always imported with Error correction turned ON, but as I was importing new a CD-R master recording that played flawlessly (in iTunes), I got digital glitches. I imported it again, and got different glitches. It still played fine.

So, on a whim, I turned OFF Error correction, and the CD-R imported at those points fine with no glitches.

I have two Apple DVD SuperDrives (or whatever they are called), and use either or both for importing using a MacBook Pro.

I found another new CD-R import with glitches.

Now I am wondering whether it has done this to 50 HOURS of work importing these.

This is my main import program, and I have tens of thousands of songs imported in another Library, and now hundreds of imports into this original-music library.

I realize this application is free, but many have used it for very important tasks; and it the main one for the OS.

The only item I am using here that isn't from Apple is a USB extension cord for the drive and the CD-R media (TDK, bought a decade ago).

Please, APPLE, Can you ask the community what needs to be done to make this fast (it sometimes crawls), non-hanging, with near-instant EQ and Volume changes, and very-importantly non-glitching?

Thank you!

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* Apparently a problem since 2010: https://ask.metafilter.com/147550/I-thought-error-checking-FIXED-errors-not-caused-them

(No, I can't major-upgrade, I believe.) macOS 10.14.6 Mojave. iTunes Version 14.1.1 (14611.2.7.1.6).

(No, I can't upgrade, I believe.) MacBook Pro (Retina, 15-inch, Late 2013); 2.6 GHz Intel Core i7; 16 GB 1600 MHz DDR3.