Yes that has a grid, otherwise you wouldn’t see grid lines.
What I did was add your test track to an empty LXC, analyze it and then sync to RB. The track had 0 BPM before in RB but after that it had 174.
You can try deleting the beatgrids folder, see Lexicon with Rekordbox 6 write support. Delete the share/PIONEER/USBANLZ (or rename) and start RB. Your grids and waveforms will be gone but you should be able to analyze with only Phrase enabled to recreate them.