I used your latest image from docker hub (https://hub.docker.com/layers/rokubun/gnss_tools/latest/images/sha256-b2534b4717ebae7bef6cd1e2dc2e834efc1a15e514f85210d4276ab9f4ea6abe?context=explore)
Therefore I used str2str to relay RTCM3 messages from an official NTRIP server. I observed, that important information is missing in the MSM7 RTCM messages:

The figures marked in red are missing in the relayed stream when using str2str in gnss_tools:latest container. In the original stream this information is present.
I recreated the docker image using https://github.com/rtklibexplorer/RTKLIB Branch: demo5 #74e326b
When I used this image the figures are present in the relayed stream. I don't know with which version of rtklib you compiled the image, but there seems to be an error.
I used your latest image from docker hub (https://hub.docker.com/layers/rokubun/gnss_tools/latest/images/sha256-b2534b4717ebae7bef6cd1e2dc2e834efc1a15e514f85210d4276ab9f4ea6abe?context=explore)
Therefore I used str2str to relay RTCM3 messages from an official NTRIP server. I observed, that important information is missing in the MSM7 RTCM messages:

The figures marked in red are missing in the relayed stream when using str2str in gnss_tools:latest container. In the original stream this information is present.
I recreated the docker image using https://github.com/rtklibexplorer/RTKLIB Branch: demo5 #74e326b
When I used this image the figures are present in the relayed stream. I don't know with which version of rtklib you compiled the image, but there seems to be an error.