Robert, please try the following workaround and report back: Click on the star symbol (tooltip "Nach Kennzeichnung sortieren") in the same row as "Betreff", "Beteiligte", and "Datum", then on "Datum" to sort by date again. Quick filter may be faster now.
Bug 1911048 Comment 2 Edit History
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Robert, please try the following workaround and report back: Click on the star symbol (tooltip "Nach Kennzeichnung sortieren", in the same row as "Betreff", "Beteiligte", and "Datum"), then on "Datum" to sort by date again. Quick filter may be faster now.