I have the newest version of Vegas 18 Pro. I have rendered this job 6 times and every time there are missing words that seem to just be chopped off at random. I have a series of photos and videos with audio narration for each one. The audio was recorded continuous in one file, but on the timeline, I have split the track and adjusted to fit the visuals.
So I finally figured out what is going on. I rendered just the audio and put it back on the timeline so I could compare waveforms.
Vegas is doing something really stupid that I haven't seen ever. I have been using Vegas since Sonic Foundry version 3.0 and this is the craziest thing I have ever seen.
Vegas is rendering each audio segment slightly stretched by 4-5% then at the end of the segment parts of the audio get chopped off.