HTTP Binding TimeOut

Hello,
yesterday I gave my Raspberry an update with sudo apt-get update. etc.
Since then I get the following error message?

2019-05-03 10: 42: 29.780 [ERROR] [org.openhab.io.net.http.HttpUtil] - Fatal transport error: java.net.SocketTimeoutException: Read timed out

2019-05-03 10: 42: 29.781 [ERROR] [ab.binding.http.internal.HttpBinding] - No response received from ‘Guntamatic’

What I already tested …When I get a webpage query from RaPi via curl, I promptly return to the input prompt, but at the page of my heater it stays stuck until the timeout.

curl --trace-ascii dump.txt http://10.10.10.7/daqdata.cgi

gives the following

== Info: Trying 10.10.10.7…
== Info: TCP_NODELAY set
== Info: Connected to 10.10.10.7 (10.10.10.7) port 80 (#0)
=> Send header, 85 bytes (0x55)
0000: GET /daqdata.cgi HTTP/1.1
001b: Host: 10.10.10.7
002d: User-Agent: curl/7.52.1
0046: Accept: /
0053:
<= Recv header, 17 bytes (0x11)
0000: HTTP/1.1 200 OK
<= Recv header, 37 bytes (0x25)
0000: Date: Fri, 03 May 2019 14:37:12 GMT
<= Recv header, 26 bytes (0x1a)
0000: Content-Type: text/plain
<= Recv header, 25 bytes (0x19)
0000: Cache-Control: no-cache
<= Recv header, 19 bytes (0x13)
0000: Connection: close
<= Recv header, 2 bytes (0x2)
0000:
<= Recv data, 448 bytes (0x1c0)
0000: AUS.9.26. .61.54. .0.00. . .17.99. . . . .0. .0.0.56.58.120.00.4
0040: 1.67.AUS.65.48.AUS.-20.00.AUS.-20.00.AUS.60.00.AUS.60.00. .40.03
0080: . . .60.00. .56.00. .AUS.-9.00.AUS.-9.00. .56.00. .AUS.-9.00. .5
00c0: 6.00. .AUS.-9.00.AUS.-9.00. .-20.00. .AUS.-9.00. .56.00. .AUS. .
0100: . . . . .NORMAL.AUS.HEIZEN.AUS.AUS.AUS.AUS.AUS.AUS.AUS. . .1060
0140: 245.32b.3590.646.102.56.00.56.00.56.00. .76. . . . . . . . . . .
0180: . . . . . . .-100.00.-100.00.-20.00.120.00.-20.00.-20.00.98.00.
== Info: Recv failure: Die Verbindung wurde vom Kommunikationspartner zurückgesetzt
== Info: Curl_http_done: called premature == 1
== Info: stopped the pause stream!
== Info: Closing connection 0