This optimization pass changes internals to become public and thus JNA trying to read their "native size".
This is a bug in R8 (the optimizer in use).
Upstream bug report: https://issuetracker.google.com/issues/157535162,
which is a duplicate of
Bug fix: https://r8-review.googlesource.com/c/r8/+/51323/
This fix will be available in r8 v2.1.28, probably getting released next week or so.
This was achived by:
* Adding `-printconfiguration r8.txt` to `proguard-rules.pro`
* Copying the part from start of `r8.txt` to before the `-printconfiguration` line into its own file.
This gets us exactly what was used in the bundled version.