Game Saves Now Larger

So since Playback v1.3 I’ve noticed that all .sav files I’ve backed up from my Pokemon games are now 1KB larger than previous backups. I’ve also noticed that this causes issues in PKHeX if you try and edit anything. It also gives an error that the save is bigger than the space on the game if you try and load the backup back on to the cartridge. Has anyone else experienced the same thing?