Log download is very slow

I just updated to the newest GitHub Mavproxy version but still I have a strange behavior during log downloads via Mavproxy. (I use a linux machine)
The first 97% of the logile is downloaded very fast via `log download "nr"`
However the last part takes ages and displaying the log download status reveals a lot of retires.
After the download here the message:
Finished downloading log32.bin (11093798 bytes 503 seconds, 22.0 kbyte/sec 2856 retries)

And during download I get a lot of artifact data (see image). Is this a bug or how can I improve the log download?


Start by reproducing the `log download "nr"` command on a Linux machine and observe the final portion of the transfer, retry count, and artifact data. Trace the log-download entry point and use the reported `log32.bin` result as the baseline; done means the download completes without the prolonged retries and excessive artifacts described.

Written by the indexing model from the issue text.