[kodomo]

Reality seems more complex than I surmised
I tried the following:
- placed a single PDF form copy [0] on an SDCard and inserted it into the Lumi
- created a subdirectory and copied it into it [1]
- renamed [1]
- edited [1] with Xodo Docs
- copied [1] into another directory [2]
- annotated [2] with NeoReader and closed it
- copied [2] into another diretory [3]
- [3] (shows the annotation from [2]) annotated further
=> [2] and [3] now show both the same annotations, as if they were the same ; [1] , however, does not.
- copied [2] to the internal memory [4]
- ejected the SDCard
- annotated [4] further
- remounted the SDCard
=> [2],[3],[4] now share the same annotations

On the other hand,
- downloaded a PDF form from a website and annotated it with NeoReader
- downloaded it a second time (saved with another file name)
=> both copies sport the annotations.

With the other files I originally noted the problem on (which I edited in parallel - having multiple copies open), it seems a bit random which annotations I'm shown.

Either way, something's really amiss, here... :-/