I've had a similar issue with connecting to a robot through a remote VPN connection.
It sounds like you've already established a connection to the robot through a Siemens switch but are experiencing issues when connecting wirelessly through a remote VPN module.
You could try switching to a different VPN provider or configuring your current VPN differently. However, another alternative to consider is using a proxy service, which can provide a stable connection and be tailored to your specific needs.
You can also try private proxies for price tracking as an option.