[org.eclipse.jetty.http.HttpParser] - Illegal character 0x0

Since updating 2 weeks ago and now at openHAB 2.2.0~20171126174916-1 (Build #1099)
I constantly get warnings in log like below.
Is there something broken now in the http parser?

[WARN ] [org.eclipse.jetty.http.HttpParser ] - Illegal character 0x0 in state=HEADER_IN_VALUE for buffer DirectByteBuffer@14adde3[p=129,l=1818,c=16384,r=1689]={HTTP/1.1 200 OK\r\n…Stack/1.0.3951\x00<<<\x00/\r\nTransfer-Enco…>\r\n0\r\n\r\n>>>minimum>-25600</m…nterPosition</n}

2017-11-28 08:04:11.710 [WARN ] [org.eclipse.jetty.http.HttpParser ] - bad HTTP parsed: 400 Illegal character 0x0 for HttpReceiverOverHTTP@a1ef4c(rsp=HEADER,failure=null)[HttpParser{s=HEADER_IN_VALUE,0 of 0}]

2017-11-28 08:04:15.394 [WARN ] [org.eclipse.jetty.http.HttpParser ] - Illegal character 0x0 in state=HEADER_IN_VALUE for buffer DirectByteBuffer@14adde3[p=129,l=1818,c=16384,r=1689]={HTTP/1.1 200 OK\r\n…Stack/1.0.3951\x00<<<\x00/\r\nTransfer-Enco…>\r\n0\r\n\r\n>>>minimum>-25600</m…nterPosition</n}

2017-11-28 08:04:15.403 [WARN ] [org.eclipse.jetty.http.HttpParser ] - bad HTTP parsed: 400 Illegal character 0x0 for HttpReceiverOverHTTP@4a543d(rsp=HEADER,failure=null)[HttpParser{s=HEADER_IN_VALUE,0 of 0}]

2017-11-28 08:04:26.204 [WARN ] [org.eclipse.jetty.http.HttpParser ] - Illegal character 0x0 in state=HEADER_IN_VALUE for buffer DirectByteBuffer@14adde3[p=129,l=1818,c=16384,r=1689]={HTTP/1.1 200 OK\r\n…Stack/1.0.3951\x00<<<\x00/\r\nTransfer-Enco…>\r\n0\r\n\r\n>>>minimum>-25600</m…nterPosition</n}

2017-11-28 08:04:26.209 [WARN ] [org.eclipse.jetty.http.HttpParser ] - bad HTTP parsed: 400 Illegal character 0x0 for HttpReceiverOverHTTP@18c9f35(rsp=HEADER,failure=null)[HttpParser{s=HEADER_IN_VALUE,0 of 0}]

I have a problem very similar to yours.