Convert binaries error

[flyingrub]

[2016-04-28 17:17:37:817] info - helper/db_feed | Publishing usage.application music
[2016-04-28 17:17:37:829] info - helper/db_feed | Publishing binary.create d2f47551cbdea347c20dcf93cc0074d4
[2016-04-28 17:17:37:839] info - helper/db_feed | Publishing binary.update d2f47551cbdea347c20dcf93cc0074d4
[2016-04-28 17:17:37:843] error - app:error | bad_request: Attachment name is not UTF-8 encoded
[2016-04-28 17:17:37:844] error - app:error | bad_request: Attachment name is not UTF-8 encoded
[2016-04-28 17:17:37:844] error - app:error | CouchError: bad_request: Attachment name is not UTF-8 encoded
    at Request._onResponse [as _callback] (/usr/local/cozy/apps/data-system/node_modules/cradle/lib/cradle.js:241:29)
    at Request.self.callback (/usr/local/cozy/apps/data-system/node_modules/request/request.js:198:22)
    at emitTwo (events.js:87:13)
    at Request.emit (events.js:172:7)
    at Request.<anonymous> (/usr/local/cozy/apps/data-system/node_modules/request/request.js:1035:10)
    at emitOne (events.js:82:20)
    at Request.emit (events.js:169:7)
    at IncomingMessage.<anonymous> (/usr/local/cozy/apps/data-system/node_modules/request/request.js:962:12)
    at emitNone (events.js:72:20)
    at IncomingMessage.emit (events.js:166:7)
[2016-04-28 17:17:37:844] error - app:error | CouchError: bad_request: Attachment name is not UTF-8 encoded
    at Request._onResponse [as _callback] (/usr/local/cozy/apps/data-system/node_modules/cradle/lib/cradle.js:241:29)
    at Request.self.callback (/usr/local/cozy/apps/data-system/node_modules/request/request.js:198:22)
    at emitTwo (events.js:87:13)
    at Request.emit (events.js:172:7)
    at Request.<anonymous> (/usr/local/cozy/apps/data-system/node_modules/request/request.js:1035:10)
    at emitOne (events.js:82:20)
    at Request.emit (events.js:169:7)
    at IncomingMessage.<anonymous> (/usr/local/cozy/apps/data-system/node_modules/request/request.js:962:12)
    at emitNone (events.js:72:20)
    at IncomingMessage.emit (events.js:166:7)
GET /data/d2f47551cbdea347c20dcf93cc00462b/binaries/convert/file 400 31.270 ms - 61

When trying to convert the file he is deleted...

EDIT : After some retry and a reboot it works. Weird.