Eyedropper bug — attribute pick-up is glitched by hidden layers above
If there are objects overlapping and above the source for the eyedropper tool, — even if those objects are on a hidden layer — the tool picks up a color of no fill and no stroke.
If the hidden layer is dropped below the target layer, the problem goes away.
These observations are based on original input by Bill Silbert in this User Forum discussion:
https://community.adobe.com/t5/indesign/indesign-cc-2020-eyedropper-problem-turning-text-to-no-color/m-p/10765424#M165918
InDesign versions v14 through v15
 Tom Dearie
    
 shared this idea
Tom Dearie
    
 shared this idea
      
    We need more information to reproduce this issue. Could you share a sample test document and show a screen recording of this issue?
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Adobe InDesign team
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       cb
    
 commented cb
    
 commentedNOPE! not the issue for us. it is buggy. that hint and all the others still don't fix the underlying bugginess, instability, unreliability of the indesign eyedropper tool. IT EXISTS. it is real. why isn't it fixed? 
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       Alyssa
    
 commented Alyssa
    
 commentedTHANK YOU!!! I was able to work around the issue by moving a layer. 
 
          