A well thought-out system design can be helpful for a time-saving clarification of the cause of the error
What do the experts need from me to narrow down the problem?
 Channel behaving strange with some other channels
To me it looks like the clarification of the cause of the error - and not only for this specific error/ malfunction "Channel behaving strangely with some other channels
" , but for many other errors - would be much faster and with much less effort if the programmers, the developers and the entire community would take a sober and unbiased look at this thesis
A well thought-out system design can be helpful for a time-saving clarification of the cause of the error.
and, after sober consideration, organise the cooperation in the project accordingly. Personally, I am of the opinion that a major shortcoming of the Hubzilla project and an insurmountable hurdle is that in the event of any disruption, one has to rely on the know-how of experts:
What do the experts need from me to narrow down the problem? 
This logic was added to most every place I know in the code where we're attempting signature verification. Your experience suggests that at least one place where we're doing verification is lacking this modification. 
The trick it seems is finding it.
I personally think that the Hubzilla project only has a chance to win over more users and developers if from now on further development of new features in the Hubzilla project is frozen
developers who are familiar with the design, the architecture of the Hubzilla project document and visualise this know-how in such a way that the hurdles for developers to enter the Hubzilla project are lowered.
So that not only a few Hubzilla experts or @Witcraft
, but also other interested, affected people have a chance to get involved in clarifying the cause of this "channel behaving strangely with some other channels
" and for other errors.
By the way @Witcraft
- a proven method for error handling is the creation of meaningful error reports. In the meantime, is there a bug report for bug  in framagit