Airstream v0.11.1
I have just released a bugfix for Airstream which fixes #45.
If you used SwitchStreamStrategy or SwitchFutureStrategy when flatMap-ping observables (see docs for when exactly each is used), or used SwitchEventStream directly, the output stream was not propagating errors in the parent observable. It would propagate errors from observables created inside the flatMap method callback, but not from the actual parent observable that you were calling flatMap on. Such errors were swallowed, which is a violation of documented Airstream behavior.
Thanks to Ajay for finding this issue and even the root cause.
Airstream v0.11.1 fixes this issue. All errors are now being propagated. This might be a breaking change if you implicitly relied on errors being swallowed here, but I'm releasing this as a patch because previous behavior was an obvious bug.
I expect this to be a fairly uncommon issue, so I will not be releasing Laminar v0.11.1 yet. Just add Airstream v0.11.1 to your build.sbt to get this update now.