PIVOTBY function: SUM turns into "_xleta.SUM"

You can use

LAMBDA(x,SUM(x))

in english Excel instead of only

SUM

I experience the same problem in Excel online if i use only SUMME or MITTELWERT or ZEILEN in german Excel.

The "_xleta." doesn't appear anymore if i use LAMBDA(x;SUMME(x)) or LAMBDA(x;MITTELWERT(x)) or LAMBDA(x;ZEILEN(x)).....

This means that if i apply SUMME or MITTELWERT or ZEILEN in german Excel "_xleta.SUM" or "_xleta.AVERAGE" or "_xleta.ROWS" (in english) is returned from time to time.

Unfortunately i don't know why this happens with SUM (SUMME) or AVERAGE (MITTELWERT) or ROWS (ZEILEN).....

In spanish Excel you can use LAMBDA(x;SUMA(x)), in french Excel LAMBDA(x;SOMME(x)), in hungarian Excel LAMBDA(x;SZUM(x)) ....