It appears from our logs that it was briefly marked as NOINDEX for 4 days at the end of the month—right around the monthly database export was taking place.
Are you aware of any change on the site which would have set this? We have had issues detecting this correctly for some sites where they redirect the home page, but that doesn't look to be the case here so it looks like a change may have happened on the site, or perhaps the Google crawler was blocked for a period?
You can still get history using our
CrUX Vis tool, which is a weekly snapshot, rather than the monthly database snapshot. It therefore shows no gaps as we only flagged this as NOINDEX for 4 days.
The good news is you're reporting CrUX data again and so should be in next month's release (assuming we don't detect it as NOINDEX again!).