I experienced something similar building an internal tool on GSuite. I had a large file with sequences of 9 digit numbers specific to our use-case, all tied to names of people (employees). Whelp, at one point the tool I was working on stopped working, and it was flagged as apparently containing social security numbers (which I suppose matched the character length).
Whelp, on the admin panel, you can get a report of those files, and then mark it as a false positive. Which I did. But then nothing happened, and nothing changed. It was no use.
The hilarious bit: It did, of course, allow me to make a copy of the file in question, and then just point the resource I was building to the new file, which was exactly the same. Weeks later... so far, so good.
Whelp, on the admin panel, you can get a report of those files, and then mark it as a false positive. Which I did. But then nothing happened, and nothing changed. It was no use.
The hilarious bit: It did, of course, allow me to make a copy of the file in question, and then just point the resource I was building to the new file, which was exactly the same. Weeks later... so far, so good.