Do some forum research - there was a post about how the swap caused issues with sleep and waking from sleep. Something about how our melatonin cycle.. oh wait. Anyway, make use of that search button, it's there for a good reason 😉
PS - Many SSD's are not the correct connection for a direct swap, and that may be what caused the issues. Make sure if it's an MBA you are using a PATA interface, other MB/P models a SATA.