when the mike button is tapped ios app crashes

Widget _buildCustomLoadingWidget() {
if (!_noMoreData)
return JumpingDotsProgressIndicator(
color: Colors.blue,
fontSize: 50.0,
);
else
return Center(
child: Container(
margin: EdgeInsets.all(10),
child: Text(
"No more results:(",
style: TextStyle(fontSize: 18),
)),
);
}

When I tried to convert speech to text it works perfectly for 3-4 times but after that, the app crashes
The error message that I get when the app crashes:

The following assertion was thrown while notifying status listeners for AnimationController:
setState() or markNeedsBuild() called during build.

This Overlay widget cannot be marked as needing to build because the framework is already in the process of building widgets. A widget can be marked as needing to be built during the build phase only if one of its ancestors is currently building. This exception is allowed because the framework builds parent widgets before children, which means a dirty descendant will always be built. Otherwise, the framework might not visit this widget during this build phase.
The widget on which setState() or markNeedsBuild() was called was: Overlay-[LabeledGlobalKey#ce253]
state: OverlayState#457ec(tickers: tracking 1 ticker, entries: [OverlayEntry#33466(opaque: false; maintainState: false), OverlayEntry#6d81d(opaque: false; maintainState: true), OverlayEntry#d470f(opaque: false; maintainState: false), OverlayEntry#e0d9c(opaque: false; maintainState: true)])
The widget which was currently being built when the offending call was made was: VoiceRecorderModalBottomSheet
dirty
dependencies: [_LocalizationsScope-[GlobalKey#edbdc], _InheritedTheme]
state: _VoiceRecorderModalBottomSheetState#71a39
When the exception was thrown, this was the stack:
#0 Element.markNeedsBuild. (package:flutter/src/widgets/framework.dart:4138:11)
#1 Element.markNeedsBuild (package:flutter/src/widgets/framework.dart:4153:6)
#2 State.setState (package:flutter/src/widgets/framework.dart:1287:15)
#3 OverlayState._didChangeEntryOpacity (package:flutter/src/widgets/overlay.dart:475:5)
#4 OverlayEntry.opaque= (package:flutter/src/widgets/overlay.dart:92:15)
...
The AnimationController notifying status listeners was: AnimationController#32b66(◀ 1.000; for MaterialPageRoute(/))