I created few BluRay, the last I made had a similar problem with yours.
First attempt used SVRT for fullHD video, NTSC 1080P.
Second time left PD render all video, gave the same.
My conclusion, My Sony CX-220 camcorder has quality options, I used the highest and according to the manual should use class 10 card for this option, I use class 4 card.
It's just an observation not know if this was indeed the case for me.
The video played regular straight in the camera and editing seemed normal too.
AMD-FX 8350 / 8GB DDR3
SSD SUV400S37240G / 2-HD WD 1TB
AMD Radeon R9 270 / AOC M2470SWD
Windows 7-64 / PD16 Ultimate