What type of issue is this?
permanent - occurring repeatedly
What issue are you facing?
This broke in #1613 - see #1613 (comment)
However, that PR fixed other cases, like retrieving the self-test report.
What are the steps to reproduce this?
hackrf_spiflash -r flash.bin -l 256
Can you provide any logs? (output, errors, etc.)
See packet captures in #1613 (comment).