Restore problems

Like some others I seem to be having restore issues. I changed the SD card in my Pi4 and can’t seem to restore any recent back up. I managed to restore one from October 27th (which only took a few minutes), but anything since is not working at all (or is taking longer than I am waiting). Thing is, not much has changed with the installation since the one that works. I have tried to restore on the Pi and also a Windows PC running Virtual Box.
If anyone has any thoughts/help that would be great. Thanks

Define not working. An error or just nothing.

How long did you wait?