The same error successfully survived and stayed in “ContentExamples” for Unreal Engine 5.3 despite from examples were reworked.
I think some steps should be done:
First: Adding details about abnormal “Abs” in text will be useful
NOTICE:
“Power” in Material Editor has special behavior. Base value must be positive, values less than 0 will be clamped. If you want use negative value, use “Abs” on it.
Second. Add “Abs” before “Power” to try fix graph (Positive Y values with negative X values)
But with base = -2 and exponential = 3 this will be still inconveniently 8 (not -8)