Currently that's solved because transactions aren't added live by every user but instead get batched together and added as a group so individually you just have

Currently that's solved because transactions aren't added live by every user but instead get batched together and added as a group so individually you just have to wait for some block to pickup your transaction from the pool of available transactions. What you're suggesting could potentially become a problem for a technology if new block propagation takes longer than new block discovery. Today orphan blocks aren't exactly rare there're several a month where two different pools will announce new blocks within a couple seconds of each other and one gets abandoned because it was the later one or because the other block had a new block mined from it faster.