Since the latest Windows Mail update to Version 16005.12827.20200.0 all emails sent via my Gmail account end up in the Spam folder instead of the normal Sent folder. This is confusing as it appears as if the email was not sent. Is this a general problem? If so, please can you update the Mail app to correct this problem.
I have reported this via Feedback https://aka.ms/AA8ksdi but so far have had no response.