There’s a continuity error that was not fixed for the original version of ANH:R. R2’s restraning bolt mark appears in the shot where he collapses after the Jawas tase him before he’s supposed to have gotten the bolt.

https://drive.google.com/file/d/1tEpOdtG9QJzmzuHrXE6VoACH5_7rX-no/view?usp=sharing

Also, in certain shots, there’s a white spot in the area where the bolt was already put on:

https://drive.google.com/file/d/17FhffxoSfT-7x2tO4YW6mszDfwhb-n0-/view?usp=sharing
https://drive.google.com/file/d/1S0QtNupxp4mBn4IpNh79Pmim9Gp-wQ1S/view?usp=sharing