Message bus does not respect subfolder during update process

[Strikki_Strik (Sergei Petrunin)]

I’m just perform an update from 1.5.0.beta8 to 1.5.0.beta9 of Discourse with enabled subfolder installation.
My Discourse was installed via official guide and subfolder enabled according to official how-to.

During update process the following picture persists:

And in the mean time in browser console logs I seen the following messages:

So seems my case is similar to this, described in this topic, but I checked and get long polling base url set:

But still update seems to pass successfully

[codinghorror (Jeff Atwood)]

Yep, this was a bug that @eviltrout fixed a week or so ago.