QuickMath broken on latest Mac Desktop update (V23.1.1 R12.1)

After a recent R-release update, the inline calculator (QuickMath) in dollar amount fields is broken. I've been using this feature daily for 13+ years and this is clearly a regression.

What I'm doing: Entering a multi-operand calculation directly in a dollar field — e.g., typing 1563 + 1991 = to get 35.54, using the automatic decimal feature.

Failure mode 1 — with "Automatically Place Decimal Point" enabled: The first number is entered correctly (1563 → 15.63). After typing + and beginning the second operand, subsequent digits prepend .0 — so typing 19 shows .019 in the field instead of buffering toward 19.91. There is no way to correct it.

Failure mode 2 — with "Automatically Place Decimal Point" disabled: The first operand works correctly. After typing an operator, at least two keys stop functioning entirely in the field: the decimal point key does nothing, and Delete/Backspace does nothing. The operand cannot be corrected or completed accurately. So if I typed 19.91 with the decimal, it converts it to 1,991.00!

Both modes point to the same underlying issue: the field enters a broken input state after the first operator is typed. The first number is handled correctly; everything after the first + / - / * / / is broken.

This started right after the most recent app auto-update, and I’m on the latest macOS (Tahoe 26.4.1)

Has anyone else seen this after a recent update? Is there a known workaround other than disabling QuickMath entirely and doing math externally? I use it all the time in hand-entered transactions and doing my math anywhere else (even just popping up a Spotlight field) is going to feel so slow in comparison!