OpenSSH | X11 forwarding fails if IPv6 is disabled

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G_DIETPI_VERSION_CORE=8
G_DIETPI_VERSION_SUB=1
G_DIETPI_VERSION_RC=2
G_GITBRANCH='master'
G_GITOWNER='MichaIng'
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bullseye

Linux EEEPC 5.10.0-11-amd64 #1 SMP Debian 5.10.92-1 (2022-01-18) x86_64 GNU/Linux

When installing X11 to use graphical programs via ssh and at the same time disable ipv6 then the program can't be displayed via ssh. Did some testing and at first i thought it was some installed software problem, but when i enable ipv6 again all works again. I use opensshserver and not dropbear.

Greetings