I'm seeing a startup lag with Fraunhofer, which then causes everything to be off. Here is the PPro display with a 29.97 fps project with orig, AC3 and Fraunhofer. Timeline V1/A1 work area used to generate the AC3 and fran clips:
Notice that AC3 is also little lagging. No lag using FFMPEG AAC. libfdk-aac-2.dll with 2/6/2020 date was I assume added during plugin install.