Godzilla exhibits the same slow encode as Captain Marvel if converting the audio to ac3. US 4K + BD disc bought at Walmart.
You can try CloneBD beta 1.2.5.2 https://forum.redfox.bz/threads/clonebd-beta-1-2-5-2.77358/ If CloneBD beta 1.2.5.2 does not work the notes mention "a few further known bugs are scheduled to be fixed in the next beta"
I'm going to guess you know this title is still slow. I did run it again for a short amount of time with the newest beta and captured a log. Here it is just in case it is useful. This title was tried after Captain Marvel completed the entire encode.
How slow is slow? It's taking me about 3 hours to do a DTS MKV. Seems slower that before but not done many UHDs.
This isn't the UHD, it's the BD and it's taking that long. I haven't had time to try the newest version yet but I intend to today.
Oops. Is there a difference between UHD disks and regular Blu-rays when it comes to converting the audio? Seems like all the AC3 conversions get 100+ fps but the DTS conversions get like 28 fps.