[Bug] predFit is trying to find "start" parameter of nls.

[spinningwatt]

If we use the "start" parameter during the calculation of nls model, predFit will try to find the "start" parameter in the global environment. but the value of this parameter makes no difference.

Here is an example: https://stackoverflow.com/questions/70376640/cannot-use-predfit-to-get-confidence-interval-data