TinyMCE Cutting off Text

PowerShell Universal
1 
Product: PowerShell Universal
Version: 5.6.13

I have a form with multiple TInyMCE editors within the UD Form. I have each tinymce editor copying its own contents to a hidden textbox to allow validation within the form and to get the contents later when submitting the form:

$TinyMCESettings = @{
        menubar             = 'edit view insert format table'
        plugins             = "link autolink image lists table searchreplace fullscreen"
        toolbar             = 'undo redo link image styles bold italic underline bullist numlist outdent indent searchreplace fullscreen'
        link_default_target = '_blank'
        browser_spellcheck  = $true
        contextmenu         = $false
        statusbar           = $false
    }
New-UDTinyMCE -OnEditorChange {
    Set-UDElement -Id 'problemDescription' -Properties @{
        value = $($Body | ConvertFrom-Json)
    }
} -Init $TinyMCESettings
New-UDElement -Tag 'div' -Content {
    New-UDTextbox -Id 'problemDescription'
} -Attributes @{
    style = @{
        display = 'none'
    }
}

Whenever users submit the form it seems to cut off some of the text they enter into the tinymce editor. Has anyone seen this issue before? Is there a rich text editor similar to tinymce I should be using instead?