I've got an annoying bug that made Contexts unusable to me. After 10-15 minutes it steals focus from the active window and then the OS will try to bring up the previous app, which means it might even switch desktops to do so.
If I quit contexts bug goes away for some time, but it returns after a while :(
Sent an email to the creator, but given the update cadence I am not holding my breath for a fix this decade.