I get an error screen 2345-0021 when I try to send files to the switch using both the builds from tannhuser and m4xw. Large numbers of small files fail after a few files, and large files fail after a certain percentage. I haven't done any testing to see if it's consistent after a certain number of bytes or whatever, but it seems like that might be the case.
Using hekate, FW 5.1.0.
LibnxError_BadGfxDequeueBuffer
Don't use it docked