Host migration at kuva survival

[ShadowWolfric]

This has been happening to me for the past month on various occasions when i spent over 40 minutes at kuva survival. At around 50 min - 60 min mark, i always get a host migration error that returns me to my orbiter before i get a pop up asking whether i want to rejoin the session and if i choose to rejoin, i get the rewards for the time spent except for the kuva that was the original reason for farming. Despite what option i select at this pop up, i never recieve the kuva that was farmed up till the point. I just want to find out if this was due to my internet connection or something to do with my game client.