<p188:extLst>
<p:ext xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main" uri="{5BB2D875-25FF-4072-B9AC-8F64D62656EB}">
<p228:taskDetails xmlns:p228="http://schemas.microsoft.com/office/powerpoint/2022/08/main">
<p228:history>
<p228:event time="2024-07-16T05:56:24.928" id="{22A90AAB-29DC-4F45-80B8-41660EB3CE91}">
<p228:atrbtn authorId="{DDBD2B34-3E97-38F7-B7A9-5BD8D52D7288}"/>
<p228:anchr>
<p228:comment id="{C5BB4569-00FC-429B-B44C-282847B06E34}"/>
</p228:anchr>
<p228:add/>
In part \ppt\comment\modernComment... part is coded in the SDK metadata as p188:ext. This causes OpenXmlUnknownElement to be assigned as the child of p188:extLst.
This should be fixed on our schema processor.