@nestort In short: As a developer I don't have any means to check this.
#F-Droid has some automated procedure that monitors a source code repository (Github in this case) and figures out, when a new release should be built. Then it automatically builds the application from its source code and makes it available to F-Droid users.
This process can fail at any step, and I don't have any "support person" to check and fix this.
See our discussion of the similar case of broken process with F-droid team member: https://github.com/andstatus/andstatus/issues/326