CLI output redirection to http results in error 'Bad file number'

[Magnus2]

When using following command ...

 show run | redirect http://1.1.1.1/test.php

... it returns immediately to the promt. However the log shows following entry:

%SYS-3-URLWRITEFAIL: redirection url write failed 'Bad file number'

No ip packets arrive on the target server. When using

copy running-config http://1.1.1.1/test.php

everythings works as expected (interactively).

Tested with Cisco IOS XE 03.16.04b.S