Well the issues only happen when the heads release from park and begin to read the cartridge for the first time. thats when the failure occures. 

Eventually if you power cycle it 50,000 times itll pick up and access the disk properly. 

Once it gets past this point, there are no more issues. heads work fine. 

But once they park, and release to re-read the disk after a power cycle/sleep cycle or eject, boom. Failure. gotta start over again.