Rounding a number to a specific significant figure is not working properly. For example, 1.264911064 to 3 sf results in 1.26491. This problem/bug is recent I guess, because in the past I got correct answers of rounding to sf.
Have you tried one of these?
x = 1.264911064; NumberForm[x, 3] Round[x, 1/100] // N ResourceFunction["DecimalRound"][x, 3]
