Incorrect "Last Modified Date" of Voice Memos's m4a files on iPhone iOS 15.4.1 - error saving to FILES operation

Dear Support Community,

The "Last Modified Date" of a m4a file made by Apple's Voice Memos on iPhone with iOS15.4.1 was not preserved during "Save to Files" operation on Voice Memos app. The entire "Save to Files" operation was performed on a iPhone saved to the local iPhone storage.

The "Last Modified Date" was preserved correctly only the first time I executed the "Save to Files" operation. But, all subsequent "Save to Files" attempts stopped preserving the correct "Last Modified Date." For unknown reason, all subsequent "Save to Files" attempts all saved with "January 4th 2022" as the "Last Modified Date." Today's date is June 12, 2022. Where is "January 4th 2022" coming from? I even restarted the iPhone to try again, but still doesn't preserve the correct "Last Modified Date,"

Anyone had similar problem? Is there a bug fix for this? Please help!

Best regards,

etrJ30