Mutt stops showing mail contents

[Josef Wolf]

Hello,

I am using mutt for about twwenty years now and am happy so far.

Usually, I start mutt in a screen session and let it run for a long time,
until I need to reboot the system. This way, I can ssh to my mail host from
everywhere and resume the screen session with the running mutt at any time.

But last week, mutt started to mis-behave.

Mutt starts up as always and works as expected. But after some time, it stops
to show mail contents. It still shows the sidebar with all existing folders
and the list of messages in the current folder. But no message bodies or
attachments are shown at all.

Mutt stops not only to show the contents, but also when replying to a mail
with quote, I end up in an emacs with nothing but the header. So mutt forgets
all the mail contents except the header.

Changing to a different mail or even to a different folder don't help. The
only way is to quit mutt and start again. Then it works again for several
hours or even days, just to eventually stop showing mail contents again.

This is mutt-1.10.1 on opensuse-leap-15.1

Any help to track this down?

Might this be a problem with the size of my inbox (currently 2.9gB)?

-- 
Josef Wolf
jw at raven.inka.de