A new Horizon environment has gone into production. External sessions are being disconnected after a random period of time. The following information…

A new Horizon environment has gone into production. External sessions are being disconnected after a random period of time. The following information has been documented by the administrator: . Internal and external users are able to connect to their desktops. . External sessions connect via Unified Access Gateway. . Users are immediately able to reconnect but are disconnected again in a few minutes. . Due to limited amount of public IP addresses, all traffic flows through a load balancer. . Internal sessions, connected directly to the desktops, are not impacted. . While the session remains connected, all expected functionality works properly. What could be a cause of this issue?