Audio Issue, Bug?

A new audio issue has shown up in my work flow. The setup:
Ursa Mini Pro 4.6K connected via snake to a Zoom F4. TC from F4 to Ursa over BMC, audio mix from F4 to Ursa over dual XLR. Shooting RAW 3:1 on ursa, recording Polywave files on F4 with 4 mono tracks.

I shoot 3 takes and import to Resolve. Put the 6 files into a bin, select them and select Auto sync append tracks.
All looks good. Place in timeline and all audio tracks are shown with wave forms. The first 2 takes play fine, all 6 tracks, but the last take only plays the embedded tracks on play back, not the linked tracks. Go to Fairlight tab and all tracks appear with waveforms, but in take 3 only embedded files play, not the 4 linked files. Export as dailies with 5 tracks, (1 stereo embedded, 4 linked) import into Premiere and take 3 has 5 audio tracks, but only wave form and audio in embedded camera track, linked tracks are empty.

2 Questions:
1) Why is this happening
2) is there a way to sync a sound file to a .dng file manually and then link them so I can correct this issue on a per case basis?

In a further development, I attempted to manually sync in Fairlight page, and I notice that the audio file, unlike in the other takes, is shorter (time wise) than the .DNG. In the other takes I rolled sound first then video, then cut camera first then audio recorder. On this take I accidentally did the opposite, resulting in an audio file shorter than the video file. Would this screw up the "auto sync" process?

I am going to open the file with Wave Agent and resave to see if that changes anything...