[Evolution] headers not showing

[Frank <frank zimmermann berlin freenet de>]

Good evening,

I am using Evolution 3.42.1-2 on Arch Linux. Since recently the email 
header are no longer showing, neither in the main window nor when 
opening a message in a separate window. This is independent on the 
theme. Furthermore independnet of the DE/WM, the issue shows in both 
Gnome nad Sway.

Any hints how to solve this?

Thanks Frank