I reproduces in Nightly for me in safe mode. Here's a [screen recording](https://drive.google.com/file/d/1Nmh6Kxqsa73AWsyV7qlLPtSlfIrWLKo7/view) (the timing seems to matter).
Bug 1740338 Comment 2 Edit History
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It reproduces in Nightly for me in safe mode. Here's a [screen recording](https://drive.google.com/file/d/1Nmh6Kxqsa73AWsyV7qlLPtSlfIrWLKo7/view) (the timing seems to matter).