JMaxwell and I found the lifter sitting with a message saying a limit switch was hit. We hit the esc button and motion control was restored.
For networking issues, we watched pings between poltarg2p2 and poltarac as well as between poltarg2p2 and poltarcama. The first combination runs from hall to counting house while the second stays in the hall. Pings that stayed in the hall were fine, while pings between hall and counting house went through periods of high latency and significant packet loss. The network problem should be somewhere in between.
Hall A staff should investigate.