We have a list column called 'Client' name and is a metadata column from SharePoint Term Store Management. Once the user clicked on Submit, all the data entered or selected includes Client should be saved to the SharePoint list and it works for most of the time. Since the end of January or beginning of February, Client name is not saved to the list. This issues happens randomly around 1 out 20. Even the same day the same person submitted two requests, one of them is fine and another has an error. Also, the same day two different people submitted the same kind of request, one is fine and another item is missing Client.
There is a Microsoft flow running behind the list since October. However, the flow and form never experience any issue before the end of January. Also, as described above, the same day two different people submit the same kind of requests and one is actually go through smoothly.
This problems happens four or five times and we have no idea what's actually going on.