Evaluation with negative exponent does not work in version 2.0.4, 2.0.5

[xivanal]

2^-1 - this works in online playground - v. 2.0.1
2^-1 - this does not work in v 2.0.4/5 -> error
2^(-1) - this works in v 2.0.4/5
2^(2*-1) - this does not work in v 2.0.4/5 -> error

Error: TypeError: Cannot read properties of undefined (reading 'value')