I am using a Leica Q2M. All I am doing it importing into LrC A different inquiry, one more of method, not problem solving. I notice you are creating B&W via changing the Treatment in LrC. Have you tried accomplishing that via DxO NIK Silver Effex instead? Via a plug-in. Yes, that would create an export, a TIFF. But you would have more edit capability. I think DxO offers a trial. By @GoldingD
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