Loscil not reading tables loaded in with readbuf in csound~

[vlazzarini]

If I load a sample into an ftable in csound~ using the readbuf message, loscil will not play it. If I use writebuf to copy the ftable back into a buffer in Max, it works as expected- copying the entire ftable into the buffer.
Example csd, maxpat, and sample:
https://www.dropbox.com/s/jcivqb5y18bfijv/loscilLoadTest.zip?dl=0

From
csound/csound#502