BoxForm render problem

[asukaminato0721]

Describe the bug
A clear and concise description of what the bug is. (Have you checked FAQ?)

LocalSubmit[Integrate[1/(1 - Sqrt[x])^3, x],
 HandlerFunctions -> <|"TaskFinished" -> MessageDialog|>, 
 HandlerFunctionsKeys -> {"EvaluationExpression", "EvaluationResult"}]

Expected behavior

show the image of expression.

Screenshots
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Environment (please complete the following information):

• Operating system: linux
• Mathematica/Engine: 12.1
• VS Code: 1.84.2
• Version: 0.1.1

Additional context