LONDON VFR Falty bridges

Your video card may not be strong enough...read.

https://flyawaysimulation.com/downloads/files/24657/x-plane-11-london-vfr-v12-scenery/

I don't think that problem is in video card (MSI GeForce GTX 1080 GAMING X 8G). Can I upload to forum picture and log file? It seems like ther is problem with layers or another addons. 

Yes, upload so we can see what you see.
I don't have that installed but some other member might.

I have seen posted (not sure where) that deleting the scenery_packs.ini file can solve this. Apparently when you add new items they are added at the top of this ".ini" file but need to be properly placed alphebetically. Deleting the ".ini" file forces X Plane to re-create it with everything in the correct order.

Now a word of advice; I am passing on information I read in passing so I would suggest that rather than delete that file simply cut and paste it somewhere safe just in case that info I read was wrong!

I've just tried deleting the .ini file and indeed X Plane did re-create it, whether this will fix your problem or not I don't know but please post back and tell us how you got on.

Stay s&l,

Ian.