Output disconnected on s390x getting no output build failures

I am getting some failures due to no output being received on my builds for s390x:

No output has been received in the last 10m0s, this potentially indicates a stalled build or something wrong with the build itself.

The problem is that those builds are not really stuck on those commands, it just seems like an stdout disconnection, An example:

$ git clone --no-checkout --branch move-s390x-cros

The command above is not even complete, the branch name is move-s390x-crossbow. Another example:

$ pip install --upgrade pip
Collecting pip
  Downloading pip

So basically it is like the output is completely disconnected. I am trying to build Apache Arrow on s390x on our auxiliary crossbow repository:
Those are some examples of builds:

This is still happening. We probably move to a different system that supports s390x as this is a blocker for us.

I am also seeing this issue too.

I modified the .travis.yml deleting some features, and I haven’t seen the “getting no output build failures” errors after that. I am not sure if it comes from our modified .travis.yml, or because Travis or s390x server’s admin might do something to fix it.