We do use Google Workspace including Gmail at work. I use Thunderbird on 'Windows 10. I regularly receive a market report by email. After I deleted the email with the market report it is not possible to find these emails anymore with the search function in the 'trash' or 'all emails' folder. Whether I search for the sender or the subject or any other word the emails will not be found. The emails are still in the folder as I can find them manually scrolling through all emails. I do not have this problems with other emails. I have installed the account on MS Outlook and had no problem finding the emails. The same online in Gmail. One special about these emails is that they are send to a group of recipients all in bcc.