Adding to my previous message (be it for you if you still experience the issue or for future Linux users in the thread), I eventually got tired of getting an exception in the log every time I hover over a button, and tried Oracle Java,
jre-8u202-linux-x64.tar.gz. That seems to work perfectly without even the minor issues I had previously (and it should, really, this is the Java version the game is meant to be ran with). The only annoying part was installation - you can get it from
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but to download it without getting an oracle account requires using
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from
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.