Message, preview panes not receiving update events

Actually, two questions: a. Neither my messages pane nor my preview pane receives an update event when I click a folder or message respectively. If I click a folder and select open in new tab or new window, then: * the message pane will be updated exactly once - If i get new messages or click other folders it will not update; and * the preview pane will update when I click message headers in the message pane until I click a different folder in the folder pane, from which time neither the message pane nor the preview pane will update. b. what are the bugzilla rules for passwords because it refuses to allow me to submit a bug until I update my password and refuses to update my password because I don't have enough classes of character (despite including lowers, uppers, numbers and punctuation) Running MozillaThunderbird-68.1.1-lp150.3.51.1.x86_64 on linux