A fix/workaround for this has been added to the devicetree in the v0.8.8 firmware release (as well as the 5.10 based recovery builds which embed their own device tree).
The workaround is to reduce the maximum speed for the SD card.
I believe the issue is signal-integrity related and could be fixed (without a dramatic speed reduction) by tuning some physical settings in the SD controller but that will take a while to test and verify.