BURT https://mysupport.netapp.com/NOW/cgi-bin/bol?Type=Detail&Display=1363263
No, you can't search for it. And it's not mentioned in the readme or "known issues" for SVC 4.4.
Pretty awful that NetApp don't disclose the bug, haven't patched it, and leave it to unsuspecting customers to run into it and waste their time on it. We upgraded to 4.4 recently and now we have a half-working backup solution.
Apparently it'll be fixed in 4.5, whenever that comes out!