I have observed one more thing with these failed events. In the event section, usually at the end of each event, the default fields like host, sourcetype, etc., will be appended and displayed. Similarly, in addition to those default fields, I could see the Request_ID field is also displayed in that section after each event. In that place I could see the format of Request_ID is in unexpected form. Please check the below screenshot (After the field CT=1, the section of default fields is shown)
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