At least Fu v6.4+
OS and version:
Tried and verified on several flavours of Windows.
Additional relevant system info:
Description of the bug:
When dealing with fuses that process non-Image like DataTypes that you'd like to group or turn into a Macro, you have to add Piperouters if you want the in- or outgoing connections to survive a reload of a comp (or even a copy / paste process). The bug will strip the connections of those Group or Macro nodes and thus break the comp once you try to re-open it on your workstation or render it on a network. This doesn't happen when you're using classic Image based nodes in your macros or groups.
You can find out more about it in my "Macro (or Group) Oddities" topic.
Severity (Trivial, Minor, Major, Critical)
Hmmm, hard to say. It depends on how much you use nodes that deal with anything other than Image DataTypes and how many of those nodegraphs need to be turned into a Macro or Group. For me personally, I'd say it's major.
Steps to reproduce:
Download the zip archive, install both fuses and then open the comp. All steps have been included as notes inside the comp.
Please, if possible, provide a Fusion setup to help demonstrate the behaviour, either as an attachment or between