problem with 1+ chunks or anything I don't know.
reset and 1 chunk, no connection lost and resumable.but with 2 chunks socket issues/connection problems.
example links+log:
*login data not changed (same username:password)
also (maybe offtopic)-on package name>right click>properties>Max. Chunks per Download>1 but JD2 trying 2 chunks for new download.old ones I set global setting:1 chunk.now global setting:1+ on package:1
you can use same log file for this issue.