Dragon Ball Z Season 8 - Navigation errors

[Insectoid]

I've been using MakeMKV for some time now, ripping DVDs of various genres. My latest project is converting the Dragon Ball Z season sets. Up until Season 8, I had no problems whatsoever; each disc had a "complex multiplex" (which is the main title, with 2 angles) and a second title (the "marathon mode"). I am currently using MakeMKV v1.8.11 for Windows (64-bit).

When I got to Season 8, instead of the expected complex multiplex, I got the following messages in the log, with debug mode turned on:
001003:0020 DEBUG: Code 0 at 6PL_4Ui,0RJJqBB\:121274216
001003:0020 DEBUG: Code 0 at buMDQ^Wso}O}]*5C2r:29394390
001003:0020 DEBUG: Code 0 at buMDQ^Wso}O}]*5C2r:213141530
003015:0000 Title #11 (2:25:45) was skipped due to navigation error
Title skip vts=5 pgcn=1 hash=5CFEB883EA27CA89
003019:0000 Cells 26-end were skipped due to cell commands (structure protection?)
003028:0000 Title #12 was added (25 cell(s), 1:55:59)
Title skip vts=5 pgcn=2 hash=9C899038C3EA3965

Title 11 is the title I wish to save; Title 12 is the second (marathon) title. So what gives? The discs are in perfect physical condition, so that couldn't be the problem.

[Woodstock]

You will probably have to submit the information asked for in the FAQ below to Mike for this.

"Perfect condition" does not preclude errors in the disks. Sometimes, they're mastered poorly.

The debug messages indicate that MakeMKV is attempting some work-arounds to figure out the disk structure, and they aren't working. The additional information from the log plus the information files from the disk will help Mike come up with a fix.

[Insectoid]

Problem persists in 1.8.12. I will send Mike the relevant information. Thanks.