I'm assuming my hunch in comment 1 is correct, in which case we can consider this diagnosed as depending on bug 1884807 (and bug 1916002, which blocks this from being closed since this will continue affecting release users until we take action on bug 1916002.)
Bug 1911803 Comment 2 Edit History
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I'm assuming my hunch at the end of comment 1 is correct, in which case we can consider this diagnosed as depending on bug 1884807 (and hence fixed-in-nightly), and also depending on bug 1916002, which blocks this from being closed since this will continue affecting release users until we take action there.