I downgraded my unit to 9.2 and everything seems to work, however using the downgrader check in this thread I have some weird anomalies. I see one title ID for amiibo (I assume because I came down from 9.9 and 9.2 had no support it's an extra title) but the others I'm not sure about.
Title ID 0x0004009b00010402
Expected version 0x1002
Installed version 0x1402
Title ID 0x0004003000009e02 (amiibo)
Extra title
Title ID 0x0004001b00010802 (all I could find was dummy.txt)
Expected version 0x0000
Installed version 0x0400
Title ID 0x0004013000001b02 (GPIO System Module)
Expected version 0x0800
Installed version 0x0c01
Title ID 0x0004013000001a02 (DSP System Module)
Expected version 0x1400
Installed version 0x1801
Any thoughts?