Record the follow-up diagnostic from Sam's screenshot: Beginning Date/Time shows 10:30 AM while Beginning Hour and Beginning Minute show 14 and 30, making the page appear internally inconsistent.
a4RUV000004KMV72AO.Beginning_Date_Time__c = 2026-04-29T14:30:00.000+0000.4/29/2026, 10:30 AM.Beginning_Time__c = 14:30:00.000Z.Beginning_Hour__c formula is HOUR(Beginning_Time__c), so it returns 14.Beginning_Minute__c formula is MINUTE(Beginning_Time__c), so it returns 30.Ending_Date_Time__c is blank for this record and many recent partial-day records.Ending_Date__c and Ending_Time__c are populated, but Ending_Date_Time__c is not.Length_Minutes__c stays blank when Beginning_Date_Time__c exists and Ending_Date_Time__c is null.Beginning_Hour__c, Beginning_Minute__c, and probably Length_Minutes__c from the visible record layout unless they are needed for admin debugging.Beginning_Date_Time__c and Ending_Date_Time__c, once Ending_Date_Time__c is populated.New_Time_Off_Request so it writes Ending_Date_Time__c for partial-day requests.Ending_Date_Time__c from their populated ending date/time components.