My file got lost and got replaced with something new new

This is not a bug.

Do not rely on "recent files" in the Home screen. It is just a passive link to whatever location on disk the file was last saved to. If the file is moved or modified outside Photoshop, the link breaks and you just get a blank document. It does not keep track of the file.

Recent Files is a convenience feature, to let you quickly pick up where you left off before lunch - it is not intended for file management. Use a file browser and note where you save your files.