P: Copy/paste setting bug

If you mean auto setting in Lightroom, then no, I don't use it. Here are pictures attached, where is 1 - picture I copy settings from, 2 - picture I copy settings to (all default), 3 - result. What you are right about, and that's what I've just noticed, that it indeed looks like Auto setting switched on. If I try to apply Auto setting on this particular photo it gives quite the same result. But the fact is I never used auto setting neither I didn't apply it on any photo intentionally.
 

Thank you for the info.

Is the image from which you are copying using an auto-White Balance or Auto (exposure and color)? 

Can you show me a screen grab of your Light panel for the copied image and a before and after of your Light Panel for the pasted image?

Lightroom CC version: 1.4 [ 20180608-0705-e1ba7c8 ] (Jun  9 2018)Operating system: Mac OS 10
OS Version: 10.13 [5]
Application architecture: x64
Logical processor count: 4
Processor speed: 2,7 GHz
Built-in memory: 8 192,0 MB
Real memory available to Lightroom CC: 8 192,0 MB
Real memory used by Lightroom CC: 205,7 MB (2,5%)
Virtual memory used by Lightroom CC: 2 588,7 MB
Memory cache size: 701,2 MB
Internal Camera Raw revision: 976
Maximum thread count used by Camera Raw: 3
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 1126MB / 4095MB (27%)
Camera Raw real memory: 1128MB / 8192MB (13%)
Displays: 1) 2560x1600

Graphics Processor Info: 
Metal: Intel(R) Iris(TM) Graphics 6100

Lightroom CC version: 1.4 [ 20180608-0705-e1ba7c8 ] (Jun  9 2018)Operating system: Mac OS 10
OS Version: 10.13 [5]
Application architecture: x64
Logical processor count: 4
Processor speed: 2,7 GHz
Built-in memory: 8 192,0 MB
Real memory available to Lightroom CC: 8 192,0 MB
Real memory used by Lightroom CC: 205,7 MB (2,5%)
Virtual memory used by Lightroom CC: 2 588,7 MB
Memory cache size: 701,2 MB
Internal Camera Raw revision: 976
Maximum thread count used by Camera Raw: 3
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 1126MB / 4095MB (27%)
Camera Raw real memory: 1128MB / 8192MB (13%)
Displays: 1) 2560x1600

Graphics Processor Info: 
Metal: Intel(R) Iris(TM) Graphics 6100

Mikhail, 

Please go to Help>System Info ... and copy your Lightroom version number and place it in your reply. 
Thank you.