B5 Lite Firmware upgrade fails

I had B5 Lite link up for a few days without issue. Then my station mode radio rebooted and all devices downstream were unreachable. During a support session we discovered chain 2 did not have Rx or Tx just chain 1. Support tech immediately offer to send a replacement. Replacement arrived 2 days later. All attempts to upgrade to the latest firmware to match existing AP mode radio failed. A second replacement is on it’s way. Has anyone else had this issue?