set the userAgent to empty, it cannot be restored to the system userAgent

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Environment

Technology	Version
Flutter version	3.19.6
Plugin version	^6.0.0
Android version	-
iOS version	17.5
macOS version	14.5
Xcode version	15.4
Google Chrome version	-

Device information:

Simulate 17.5

Description

1. init usreAgent = ""
2. delay 1 second
3. set userAgent = Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6 Safari/605.1.15
4. delay 1 second
5. set userAgent = "" OR null it cannot be restored to the system userAgent

Expected behavior:

Current behavior:

Steps to reproduce

InAppWebView( keepAlive: keepAlive, initialFile: "URL", initialSettings: InAppWebViewSettings( supportZoom: true, forceDark: ForceDark.AUTO, useShouldInterceptRequest: true, useShouldOverrideUrlLoading: true, allowsInlineMediaPlayback: true, allowsLinkPreview: false, sharedCookiesEnabled: true, useHybridComposition: false,

              userAgent: "",
           
              useShouldInterceptAjaxRequest: true,
            ),
          ));

controller.setSettings(settings: InAppWebViewSettings(userAgent:"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6 Safari/605.1.15"));

delay 1 second

controller.setSettings(settings: InAppWebViewSettings(userAgent:"")); controller.reload();

Images

Stacktrace/Logcat