Incorrect decoded sender name in non-utf8 header From

In the email header I get this:

From: =?koi8-r?B?4czFzsE=?= <test@email.com>

Im trying to retrive email sender using $message->getFrom() and get:

array:1 [ 0 => {#2957 +"personal": b"áÌÅÎÁ" +"mailbox": "test" +"host": "email.com" +"mail": "test@email.com" +"full": b"áÌÅÎÁ <test@email.com>" } ]

I'm expected to get: "Алена"

Laravel-imap version: 1.4.3
Laravel: 5.8.35
Php: 7.1

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