cygwin 3.1.2 + Windows 10 Home Build 10.0.18362 - alt+space hotkeys not working

[Eugene Klimov]

after upgrade cygwin to latest 3.1.2 (mintty
i have following bugs
alt+space hotkeys not working in any cygwin applications
screen inside cygwin ssh have wrong tab completion

i try get help on IRC freenode, but nobody answer me ;-(
Is anybody here who have same bugs as me?

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