Page transformation failing with ConvertTo-PnPPage, failing for the pages which has images/icons)

Hello All,

I am using PNP Powershell 1.12 and Powershell 7.

I am doing the page transformation from 2013 on-premise to SharePoint online modern site. The SharePoint 2013 has custom page layouts. I am using the below commands to do the transformation.

$sp13Conn = Connect-PnPOnline https://xxx.yyy.org/ -TransformationOnPrem -CurrentCredentials -ReturnConnection
$spOnlineConn = Connect-PnPOnline https://xyz.sharepoint.com/sites/abc -Interactive -ReturnConnection

ConvertTo-PnPPage -Identity "Coin-Exchange-Program.aspx" -PublishingPage  -TargetConnection $spOnlineConn -Connection $sp13Conn -PageLayoutMapping "C:\Temp\custompagelayoutmapping-modified.xml" -LogVerbose -LogType File -LogFolder "C:\Logs"

The above ConvertTo-PnpPage works for simple pages which has Text but its failing for the pages which has images or icons etc.

i do see Mutiple errors depending on the page I am transforming, one of the errors is

_'0x0A' is invalid within a JSON string. The string should be correctly escaped. Path: $ | LineNumber: 0 | BytePositionInLine: 83. at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& state, JsonReaderException ex)
at System.Text.Json.Serialization.JsonConverter1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state) at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan1 utf8Json, JsonTypeInfo jsonTypeInfo, Nullable1 actualByteCount) at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan1 json, JsonTypeInfo jsonTypeInfo)
at System.Text.Json.JsonSerializer.Deserialize[TValue](String json, JsonSerializerOptions options)
at PnP.Core.Model.SharePoint.PageWebPart.set_PropertiesJson(String value)
at PnP.Framework.Modernization.Transform.ContentTransformator.Transform(List`1 webParts)
at PnP.Framework.Modernization.Publishing.PublishingPageTransformator.Transform(PublishingPageTransformationInformation publishingPageTransformationInformation)

Attached is the log file and the custom page layout mapping file

Page-Transformation-Report-11-16-2022-12-51-14-PM.md
custompagelayoutmapping-modified.xml.txt

Start with the ConvertTo-PnPPage command and the attached Page-Transformation-Report and custompagelayoutmapping-modified.xml files. Reproduce the transformation from SharePoint 2013 using a page containing images or icons, then trace the reported PropertiesJson failure. Done means the affected pages transform successfully without the invalid JSON error.