Key Signatures Missing at Key Change

Working with a large orchestral score - Key signatures for parts appear for all instruments at the start of the score but when I get to a key change, the new key signature does not appear for certain instruments - this occurs for both transposing and non-transposing instruments. For example, the key signature shows at the change for Flute 1 but not Flute 2, etc. I’ve confirmed in the Notations setting that key signatures are to be shown. Is there a setting in the Set Up that I’m missing?

Perhaps you could attach an excerpt of the project that exhibits the problem so we can take a look? It’s hard to guess what might be wrong, but uploading part of the project should allow us to figure it out right away.