Did something change with death?

Did something change with sims dying? Before, as I recall when a sim passed, and you succeed in begging the Grim Reaper to bring them back that sim lives for maybe a day or two, even if the sim is really old. Recently every time it's happened the sim comes back and then dies again in seconds! It's like the Reaper saying "Ok you won't die of old age" and a minute later a bus hits you.

On a sidenote: Do repairmen still have a chance of being electrocuted?