Can't toggle state from MicroPython after Upgrade to 8.1.0 on Sonoff Basic

[Fiege]

Hello.
I updated one of my Sonoff Basics yesterday to the latest Release:

Program Version 8.1.0(tasmota)
Build Date & Time 2019-12-25T12:33:25
Core/SDK Version 2_6_1/2.2.2-dev(38a443e)
Uptime 0T00:09:16
Flash write Count 5 at 0xF7000
Boot Count 1
Restart Reason Software/System restart
Friendly Name 1 Tasmota

ESP Chip Id 4983749
Flash Chip Id 0x14405E
Flash Size 1024kB
Program Flash Size 1024kB
Program Size 566kB
Free Program Space 436kB
Free Memory 27kB

I have a lot of ESP8266 running MicroPython to switch devices on/off .
Since the update I am not able to toggle the state or send any command from MP to the Sonoff Basic.
Before the update it was running on a 6.x Version of Tasmota and everything worked fine.

This is the Python code, mostly direct copy and pasted from the MP docs:

def http_get(url, prt):
try:
_, _, host, path = url.split('/', 3)
addr = socket.getaddrinfo(host, prt)[0][-1]
s = socket.socket()
s.connect(addr)
s.send(bytes('GET /%s HTTP/1.0\r\nHost: %s\r\n\r\n' % (path, host), 'utf8'))
s.close()
except OSError as err:
print ("OSError in http get function")
#endtry

the call looks like this:
switch2UrlTgl = "http://192.168.99.213/cm?cmnd=Power%20TOGGLE"
http_get(switch2UrlTgl, 80 )

The logs on the Sonoff doesn't log any request even on "more debug"

If I paste the URL to FireFox it works like expcted.

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