Unfortunately this is a quite common issue that usually boils down to local wifi and internet equipment, location, and configuration.
Start by reading the manual sections on the Stadium App and WiFi, Internet and Bluetooth. See if your computer and household equipment, especially modem/router, meet the specs and supported technologies/devices. Search this forum for other info.
The section under Support-> Knowledge Base and FAQs for Stadium includes this item
https://kb.line6.com/helix-stadium-software-wifi-drop-outs-intermittent-connection