i have no nothing knowledge about Java or electron
But if you do not want to rebuild and tinker onto the code, i would wait for a fix at github…
Potentially a problem with our (rather old) electron version given that the character encoding issue is limited to the file chooser, which comes from electron.
But as i can see the PKGBUILD is last updated 17.5.2017
last comments on it are from 2017-06-08 BUG is reported on this day… and no updates till then…
[updates once a week] = [90% less problems]
how to add system logs