First Premiere Pro failed to playback the second audio channel in the downloaded file here as well, but once i renamed the file and skipped the ( and ) it worked. Try to use only A-Z and 0-9 when you name file and skip ( ) # ! etc, etc.
I noticed that the audio is compressed. In ProRes Premiere Pro expects uncompressed audio. Worth checking as well.
Oddly enough when i tried to re-import OBS Mac Hardware ProRes with Missing Flags (only first audio track plays).mov again this file worked though it has ( ) in the file name. I closed Premiere Pro and deleted Media Cache and Media Cache Database to simulate a fresh start but it still worked, even when i deleted the Preferences...
Renaming the file is definitely not a fix, maybe you didn't lose focus or wait long enough for PP to attempt to parse it and fail, (sometimes takes over 1min depending on type of activity in and out of PP, usually 30s):
Here for example it is renamed but broke so fast it didn't even detect audio on 2nd track on import to generate a waveform.
There are definitely flags missing in the .mov container, but which are necessary to be added we are not sure, and need an Adobe Audio Engineers input.