Thanks you for your comment. Since it would have been my first glorious capsule after lvl 500 (if that bug didnt occur), I was not sure anymore, becuase the fandom page was not accurate and didn’t say if the 500+ info overwrites lvl pre-500 info or not. I suppose the LoL-Support really did a mistake here then.
I think they never released a 3.5.5 recovery image. The last one is very old from 2022 and the most recent one is from 18th nov 2023, according to its file name it is 3.5.6.
There doesn’t seem to be any other image between these two.