An error occurs when using specific characters in Deep linking

In my app, I use deeplink to launch the app, move between screens, and receive parameters.

In most cases, screen transitions and parameter passing work normally, but an error occurs and the app stops working only when the following parameters are entered.

This is the same for both iOS and Android.

Is this normal behavior for FlutterFlow?

<Error content>

formatexception Unexpected extension byte (at offset 0)

<Problem URL>

appname://app.com/customurl?param1=%25aa

<Notes>

The page route setting is "customurl".

The parameter name is "param1".

"%25aa" is the encoded string.

The original characters are "%aa".

Since an error occurs even for %aa to %ff, it seems that an error is occurring in the character code or during decoding.

My application receives dynamic parameters issued by other applications, and I cannot control the parameters I receive, so I would like to receive such parameters.