unable to delete g mails

I don't know if this is the correct topic to select but there is nothing more relevant.I am using windows 11 and When I try to delete e mails (G mail) I click on the e mail and then delete. The e mail then disappears and I then quit out of e mails. However the next time i go into my e mails it is back again. The only way i can get them to delete is to again tick the e mail i want to delete and then click delete. If I then go into something else e.g. drafts or spam and then quit out of the e mails when i go back in the e mail i wanted to delete has gone. I have tried resetting firefox but makes no difference