RPi4, 128GB MicroSD card, 6TB USB powered drive, LE 11 nightly 20230416, latest firmware patches
I have added
force_turbo=1
core_freq_min=500
to config.txt which seems to have stopped video playback freezing at odd intervals.
When the Pi & the HDD have been powered down when I turn things on again I turn the HDD on first then the Pi. The Pi puts up the message showing the nightly in use and that's it. I have to turn the Pi off and on again for it to boot correctly.