This happens also in all the pre-releases
Yes that happens in all worlds.
EDIT: I have to mention that the lag spikes occur only if I don't have my spawn set to a bed... if I have my spawn near a bed it is completely fine...Tested it and it seems that when I repsawn on my bed the frames are low but not like lag spikes... and sometimes when i enter the world the fps is low then gradually climbing up in like 5-10 seconds. I have an idea and that is that the lag spikes are because the respawning chunks are somewhat not rendered when I die and the game is forced to quickly load them in... just a thought that could help you.
I hope this gets solved quickly. It's really frustrating.