I have a Zaxon with Flash Floopy Firmware v0.9.19a.
If fails from both symshell and sym commander (at least that's consistent!). Hardcore!
Yet direct access works with CubeMDos (|ha).
Any idea, @Prodatron (https://www.cpcwiki.eu/forum/index.php?action=profile;u=13) ?
Have a wonderful day!
EDIT: Sorry, wrong thread!