Wrong dynamic from the interaction of unrelated staves or instruments
The attached file is an example in which there seems to be a cross interaction between the dynamics of two instruments. Here we have a clarinet and two French horns. At a given point the dynamic sign applied to the clarinet behaves erratically (see the p and next f). The horns have very long crescendi. The example is the result of bisecting the problem by removing completely by groups the contents of staves. The culprit turns to be the French horn.
I have had a similar problem in the past, I recall, between staves of a piano system (in an earlier version), but it was a single instrument.
Am I doing anything wrong or it is a bug?