ToggleButton goes into infinite loop if unchecked on start

[glopesdev]

The following workflow goes into an infinite loop when the button is checked and the workflow is restarted:

Workflow

<?xml version="1.0" encoding="utf-8"?>
<WorkflowBuilder Version="2.9.0"
                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                 xmlns:rx="clr-namespace:Bonsai.Reactive;assembly=Bonsai.Core"
                 xmlns:scr="clr-namespace:Bonsai.Scripting.Expressions;assembly=Bonsai.Scripting.Expressions"
                 xmlns:gui="clr-namespace:Bonsai.Gui;assembly=Bonsai.Gui"
                 xmlns="https://bonsai-rx.org/2018/workflow">
  <Workflow>
    <Nodes>
      <Expression xsi:type="Combinator">
        <Combinator xsi:type="rx:Timer">
          <rx:DueTime>PT0S</rx:DueTime>
        </Combinator>
      </Expression>
      <Expression xsi:type="scr:ExpressionTransform">
        <scr:Expression>new(
false as Checked,
true as Enabled)</scr:Expression>
      </Expression>
      <Expression xsi:type="PropertyMapping">
        <PropertyMappings>
          <Property Name="Checked" Selector="Checked" />
        </PropertyMappings>
      </Expression>
      <Expression xsi:type="gui:ToggleButtonBuilder">
        <gui:Name>LoggingToggleButton</gui:Name>
        <gui:Enabled>true</gui:Enabled>
        <gui:Visible>true</gui:Visible>
        <gui:Text>Logging</gui:Text>
        <gui:Checked>true</gui:Checked>
      </Expression>
    </Nodes>
    <Edges>
      <Edge From="0" To="1" Label="Source1" />
      <Edge From="1" To="2" Label="Source1" />
      <Edge From="2" To="3" Label="Source1" />
    </Edges>
  </Workflow>
</WorkflowBuilder>