Missing information

When I reply (or reply all) I cannot see the message I am replying to or my signature, however, both are present when sent. When starting a new message my Signature does not show up in the preview panel but it is included when the message is sent.
First photo shows what I see when I start a new message (Blank Screen)
Second photo shows that there is information on the paper (my signature) but it does not show up in the new message panel. It is visible when sent.