For the last 3 months there were only one timeout that is not unittest_shell_hang_analyzer task on enterprise-rhel-90-64-bit variant on v6.0:
https://buildbaron.corp.mongodb.com/ui/#/bfg/BFG-2523355

unittest_shell_hang_analyzer occasionally times out specifically on enterprise-rhel-90-64-bit variant specifically on v6.0, which causes some noise, while the root cause couldn't be discovered.

There are no unittest_shell_hang_analyzer timeouts on RHEL 7/8 on v6.0 and no issues on RHEL 7/8/9 on v7.0. We are going to disable unittest_shell_hang_analyzer on enterprise-rhel-90-64-bit on v6.0 to avoid the noise.