Sure no problem. Well, now that half of Europe is staying at home, the landline (WAN) got really laggy and unreliable. So, I need a backup internet. Because I pay monthly for the mobile contract, I wanted to have also the speed benefit. Hence, I wanted to use load balancing.
Fundamentally, I use the Internet for daily work. Google, work on Austrian and UK servers, CITRIX, and sometimes do Audio and video streaming. I don't use VPN (so we have sessions to different IPs). It doesn't matter what I do, the device always take the WAN unless I "re"-save the load balancing settings. Then, it works for a few hours fine (traffic on both).
Honestly, I don't have a clue what the problem could be.