Surf-On-The-Go drops LAN WiFi when switching manually between Cellular and Wired mode

If I set up a SOTG for cellular failover, and the SOTG fails over to cellular, and then returns to the Wired mode when DNS server responses resume, the LAN WiFi never drops.

So why does it drop when manually switching from Wired to Cellular mode, or from Cellular to Wired mode? If there is no hardware reason, can the firmware please get modified so the LAN WiFi does NOT get dropped during the switchover?