Import Corrected Transcript does not work

I'm currently working on a long form (2 hours) multicam edit that will rely on transcription to create subtitles for the final product. I've completed the multicam, and exported the transcript to be checked by external reviewers. The original language is in Japanese.

I've recieved the corrected transcript, which I checked for formatting errors and found none.

However, re-importing the new transcript results in an unusable edit. While the first few lines are correctly imported, after the sixth line, the entire rest of the transcript is dumped into one segment, rendering it useless.

This had brought

the project to screeching halt, and I'm looking at the possibility of having to manually cut and paste hundreds of line of dialogue if there's no fix for this.

I've attached the corrected transcript in case there's something I missed. All help appreciated.