I don't, but it's a fairly logical assumption and the most accurate one until we find out anything different.
The bottom line is running samples, analysing the data and reporting the findings takes time. It's not a case of samples are submitted and then run in the next few hours, as much as we might wish it was.
It's obvious you are implying that, no doubt with reference to Kreuzigers case which is completely different, NADO's are selecting when they wish to start proceedings against a rider or taking their time to notify them so they can continue racing. There is no evidence to support that. The time-frame for the series of events is perfectly reasonable.