Looking for a solution or workaround, or maybe a patch for this issue.
This issue apparently affects all of our Sharepoint lists. When an item is edited using the "Edit All" function, the date/time fields (which are "Event Start" and "Event End") end up switching any after noon times from "PM" to "AM". It doesn't seem to be doing the reverse. It doesn't seem to affect it if the date/time field is edited in the process of using "Edit All". It doesn't seem to affect it if individual fields are edited by themselves. This is only happening when editing the list item in the Modern View.