[sylpheed:36647] Unchecking "Always mark as read when message is opened" not working

[Vilius Mockūnas]

Hello,

OS: Arch linux x86-64
Sylpheed: v3.6.0

Option:
Configuration->Common preferences...->Details->Interface->Always mark as
read when message is opened
is unchecked.
but when I click message it immediately turns to read status (bold font to
regular).


Option "Always mark as read when message is opened" not working properly ?

Thanks,
Vilius M.