Created attachment 160849 [details] screenshot showing spinner over mesage The "Fetching message" spinner does not stop or go away; after the message has loaded the spinner stays overlaid over the message.
Does it happen all the time? Is it just on this message, or on any of them? Can you please attach a raw .eml file of a message which causes problems, along with the IMAP debug log?
Trojitá is no longer maintained, please switch to a maintained alternative like https://apps.kde.org/kmail2/ Sorry for the inconveniences.