Update: Vim (or terminal emulator - terminology) is also affected by this. When filling the bugreport, vim repeatedly freezed and then rendered new letters in wrong place (Ctrl-L was quick-fix). I did not filled this in previous report as I was not sure some Vim plugin did not cause this, but now I'm on 4.18.0-1-amd64 and happy vimming.
-- Tomáš 'ebík' Ebenlendr PF 2018.84754157154
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