The issue is not about being logical or not, the real trick is: this piece of information of the DS being sabotaged by its own engineer is a rationalization of something magical/Force related in ANH, and it was totally unecessary. That’s why I compare that to the midichlorians: going for magic to something… logical, mathematical, biological, rational… it goes 100% against the spirit of the OT and particularly of ANH.
The fact dialogues in ANH have now a weird inconsistency with R1 ret-con is another issue, but not the worst.
(and at least PT inconsistencies are set some 20 years before ANH, not 5 minutes prior to it 😕)
Isn’t it Rogue One that is inconsistent with ANH, not the other way around?