What do you mean by switch away? Everytime you send the app to the background?
Yes. Either switch to another app, or kill it. Switched to version 0.89.10-fdroid and it works as expected.
I hope I haven't ruined your weekend dude.
Fixed in version 0.90.4 Thank you!
This bug is only fixed in 0.90.4 when I upgrade from 0.89.x with my settings intact. If I nuke Storage and setup 0.90.4 fresh then this Tor reset bug remains.