I have found the reason - it is because of %-15.15L in index_format
variable, which stands for: "If an address in the To or CC header field matches
an address defined by the users ``lists'' command, this displays "To
<list-name>", otherwise the same as %F.",
and %F means "author name, or recipient name if the message is from
you". After I source another config, my "name" changes, and thus instead
of recepient name i get author's name. I have changes %L to %n (author's
name) and it seems alright, but still %L would be more comfortable if it
did not blink like this on mailbox change. Probably, there is some way
to prevent such behaviour while keeping main functionality?
