I can also confirm that the issue is happening on Ubuntu 16.04 x86, with Beta 85.0b5. I'm going to remove the macOS tag from the title, in order to reflect that the issue is more like a general one, which happens across platforms.
Bug 1679506 Comment 9 Edit History
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I can also confirm that the issue is encountered on Ubuntu 16.04 x86, with Beta 85.0b5. I'm going to remove the macOS tag from the title, in order to reflect that the issue is more like a general one, which happens across platforms.