I have a Sony DW-Q120A installed in my Dell computer. Lately, I am only able to burn once (DVD or CD) and I have to reboot if I want to burn again. After the first burn, it won’t see the DVD or CD.
Have you tried flashing the latest firmware for your drive?
As this behaviour of the system is absolutely not normal, flashing any other firmware is extremely risky in my book. I’d try the drive in another computer to sort out system issues at first. If the drive behaves that erratic in the other system, too, then it’s time to return that thing to the vendor.
No offense but PYS1 in this drive was very twitchy to say the least. Compared to burning a disc, flashing the drive is simple and requires nothing more than a couple of CBD commands.