Okay I am a total Thor/Lokiwife so take my opinion with a grain of salt but I THINK that Thot had absolutely confidence in Loki's ability to get out of any situation, but he didn't think that Loki would come back TO HIM because historically Loki has not??? Like, they allied in Thor 2 for a time and then Loki fucked off, and Extra Amazing Grownup RagnaThor doesn't harbor illusions about Loki anymore! He was fully expecting Loki to leave!

BUT LOKI DIDN'T BECAUSE THEY LOVE EACH OTHER