While we do not have a release date for the next chapter, the developer is keeping its patrons informed about his progress.
So far he has completed a few of the scenes he wants to add (including a rather complex one), and is working on the last two main ones.
As he explained before, the previously targeted date (first week of August) was not realistic because this next update is going to be the biggest one so far. I bet we only have to wait a couple weeks though, if we extrapolate from the previous releases.
From the hints and teasers we got from him on Discord, it is bound to be a hot one