Recently there has been an influx of AUHD series matrices with older Control4 drivers causing an IP connection drop or locking-up of the matrix resulting in loss of control and loss of signal, among other issues.  Reports have come in on control systems updated to composer versions 3.2.4 to 3.3.1, though  it has not been confirmed if those are the earliest where issues occurs.  The current driver pack on the Knowledgebase (https://support.avproedge.com/portal/en/kb/articles/control4-auhd-matrix-pack) has version 322 that has been tested working with Composer version 3.3.1.  It is suggested to update the driver with the exact model you are working with and the most recent version (v322) before further LAN port or matrix issues are addressed.