Log analytics - UTF-8 link from search bug

[faitno]

I use piwik/misc/log-analytics/import_logs.py for my log analytics.
A small part of queries is defined as ????. However, if you look at the source HTML, then everything is OK.
In the picture on the link address http://yandex.ru/yandsearch?text=%EA%F3%EF%E8%F2%FC+%E2%FB%EF%F3%F1%EA%ED%EE%E5+%EF%EB%E0%F2%FC%E5&lr=213
which was well converted into Russian.
It is observed on 20% of all requests from Russian yandex and google.

Migrated from matomo-org/matomo#5885

[mattab]

I think this issue is not related to log analytics. Please open new issue with steps to reproduce in github.com/piwik/piwik/issues