goat* build hosts broken?

Hi there, since two days I was trying to get firefox87 built for the usual distribution versions. It succeeded for Leap 15.1, 15.2, and Tumbleweed x86_64, but failed for 15.3 and Tumbleweed i586. After some time it appeared to me that the succeeding build hosts are "lamb*", while the failing ones are "goat*". For details please just look at https://build.opensuse.org/packages/firefox87/job_history/home:manfred-h:moz... Is it possible that something is inconsistent/wrong/broken on any of these machines? Cheers. l8er manfred