HDR DNG falls apart at export

Hey all,

I've noticed that the HDR files from both a Nikon D5000 and my Fuji XT2 fall apart as soon as I export the HDR to a DNG out of Lightroom Classic CC. My workflow is the following:

• I need to shoot a hight contrast indoor image
• I therefore shoot a bracketed sequence image (3 shots)
• I import the RAF (fuji RAW) files into Lightroom
• I combine them into a HDR. This generates the 'filename-HDR' DNG file automatically.
• I adjust everything I need to adjust.
• I export to Jpeg. All good.
• For my archive, I export the HDR file to DNG as well. This is where the problem occurs.

Whenever I go back to open up the archived DNG file, it has major losses in the shadow areas. This does not happen to every image  but when it does, it concerns a high-contrast HDR and the shadow area falls apart big time.

• I've re-opened the original HDR and exported. File is a wreck.
• I've re-opened the original HDR file and the RAF files it was based upon as well, and exported to Jpeg. File is fine.
• I've exported again to DNG. File is a wreck.
• I've tried to export to DNG with the 'include original RAW file' checkbox checked. File is a wreck.
• I've re-opened the archived DNG file and the RAF files it was based upon as well, and exported to Jpeg. File is a wreck again.

Basically, any exported DNG turns out to be a disaster format for the HDR pics, unless it is the DNG that is automatically generated by lightroom when combining for a HDR file AND the original RAF/RAW files it's based upon are opened at the same time. Which seems odd to me because it basically requires me to save 4 images (the 3 bracketed shots + the HDR merge) + the attache xml of each, instead of one DNG. Please find below:

• Jpeg created from the exported DNG which clearly shows the data loss on the left, on the couch, the curtains....all over the place really.
• The Jpeg created from the HDR DNG automatically generated in Lightroom, while I have the original RAF files open in Lightroom as well. If I do not do the latter, the Jpeg will look like crap as well.
• I've included my Lightroom system info as well for the sake of completeness.

Question: How do I export a HDR DNG file without this absurd file loss?

Lightroom-versie: CC 2015.14 [ 1149743 ]

Licentie: Creative Cloud

Taalinstelling: nl

Besturingssysteem: Windows 10 - Home Premium Edition

Versie: 10.0.17134

Toepassingsarchitectuur: x64

Systeemarchitectuur: x64

Aantal logische processors: 8

Processorsnelheid: 2.5 GHz

Ingebouwd geheugen: 16279.6 MB

Beschikbaar fysiek geheugen voor Lightroom: 16279.6 MB

Fysiek geheugen gebruikt door Lightroom: 548.2 MB (3.3%)

Virtueel geheugen gebruikt door Lightroom: 2074.2 MB

Aantal GDI-objecten: 923

Aantal gebruikersobjecten: 2612

Aantal proceshandelingen: 1464

Cachegeheugengrootte: 1276.8MB / 3839.1MB (33.3%)

Maximumaantal door Camera Raw gebruikte threads: 5

Camera Raw SIMD-optimalisatie: SSE2,AVX,AVX2

Virtueel geheugen Camera Raw: 1149MB / 8139MB (14%)

Dpi-instelling systeem: 120 dpi

Bureaubladcompositie ingeschakeld: Ja

Schermen: 1) 1920x1080

Invoertypen: Multi-aanraking: Nee, Geïntegreerde aanraking: Nee, Geïntegreerde pen: Nee, Externe aanraking: Nee, Externe pen: Nee, Toetsenbord: Nee

GPU-info:

GeForce GTX 960M/PCIe/SSE2

Check OpenGL support: Passed

Vendor: NVIDIA Corporation

Version: 3.3.0 NVIDIA 369.09

Renderer: GeForce GTX 960M/PCIe/SSE2

LanguageVersion: 3.30 NVIDIA via Cg compiler

Toepassingsmap: C:\Program Files\Adobe\Adobe Lightroom

Bibliotheekpad: D:\Christian\Pictures\Lightroom\Lightroom Catalog.lrcat

Map Instellingen: C:\Users\Christian\AppData\Roaming\Adobe\Lightroom

Geïnstalleerde plug-ins:

1) AdobeStock

2) Canon-plug-in voor tethering

3) Facebook

4) Flickr

5) Tetheringplug-in voor Nikon

Config.lua-vlaggen: None

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