/sys/crypto/cert not supported in API REST in 11.5.4??

Btw I get 400 Bad request and content is:

{
  "code": 400,
  "message": "Input length = 1",
  "restOperationId": 3409935,
  "errorStack": [
    "java.nio.charset.MalformedInputException: Input length = 1",
    "at java.nio.charset.CoderResult.throwException(CoderResult.java:277)",
    "at java.nio.charset.CharsetDecoder.decode(CharsetDecoder.java:798)",
    "at com.f5.rest.common.RestHelper$2.run(RestHelper.java:1896)",
    "at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)",
    "at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)",
    "at java.lang.Thread.run(Thread.java:722)\n"
  ]
}

Interesting is that I can get list of virtuals using API Rest, but not list of ssl certs.