🐛 Scrollbar This widget has been unmounted, so the State no longer has a context (and should be considered defunct). about fluent_ui HOT 10 CLOSED

======== Exception caught by scheduler library =====================================================
The following assertion was thrown during a scheduler callback:
The Scrollbar's ScrollController has no ScrollPosition attached.

A Scrollbar cannot be painted without a ScrollPosition. 

The Scrollbar attempted to use the provided ScrollController. This ScrollController should be associated with the ScrollView that the Scrollbar is being applied to. When providing your own ScrollController, ensure both the Scrollbar and the Scrollable widget use the same one.

When the exception was thrown, this was the stack: 
#0      RawScrollbarState._debugCheckHasValidScrollPosition.<anonymous closure> (package:flutter/src/widgets/scrollbar.dart:1285:9)
#1      RawScrollbarState._debugCheckHasValidScrollPosition (package:flutter/src/widgets/scrollbar.dart:1310:6)
#2      RawScrollbarState._maybeTriggerScrollbar.<anonymous closure> (package:flutter/src/widgets/scrollbar.dart:1242:16)
#3      SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1143:15)
#4      SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1088:9)
#5      SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:996:5)
#9      _invoke (dart:ui/hooks.dart:166:10)
#10     PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:270:5)
#11     _drawFrame (dart:ui/hooks.dart:129:31)
(elided 3 frames from dart:async)
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