Mail in PB2 on iPhone X has been doing some bizarre things. General IMAP setup to a web host. I sent one mail out to a colleague to which they replied. However the sent email completely disappeared. It doesn't exist anymore, anywhere. I sent another to someone else last night. I don't know if they received anything, but that email completely evaporated as well, cant find it anywhere. So I wrote another and sent that. Worked fine. Never happened to me before.