This is the reason I don't like materialization/dematerialization transporters. Not only do they have the risk of coordinate failure like in the meme, but also:
The person on the other side isn't guaranteed to be the same person when rematerialized. There's the ontological argument that when you're dematerialized, you die as your physical form is eliminated and that the person appearing on the other side is merely a clone of you, but not you.
Alien interference or environmental contamination can mess up the person on rematerialization. Even small changes can alter the delicate brain chemistry we meatbags have.
Being stuck in the ship's memory buffer while it verifies an open teleporter slot can't be very fun or comfortable.
This is why I only support non-dematerializing wormhole based travel where spacetime itself opens for you to enter. Less chance of mistakes.
How about all those many scenes where someone grabs a transported person to make a quick last minute getaway.
So the computer was programmed and targeted for just one person but at the start of the transport sequence all of a sudden two people are now part of the transport.
The person on the other side isn't guaranteed to be the same person when rematerialized. There's the ontological argument that when you're dematerialized, you die as your physical form is eliminated and that the person appearing on the other side is merely a clone of you, but not you.
Roughly every 7 years for most of the body, major organs tend to take longer, more like 10. Your brain replaces cells at a way slower rate, you'll only Theseus your brain about 80% at best if you live a long healthy life.
The person on the other side isn’t guaranteed to be the same person when rematerialized. There’s the ontological argument that when you’re dematerialized, you die as your physical form is eliminated and that the person appearing on the other side is merely a clone of you, but not you.
The first ever Star Trek tie-in novel, Spock Must Die, dealt with the implications of the first issue you brought up when Spock is accidentally duplicated by the transporter.
Except the Stargate also dematerializes you. Also there's no way of guaranteeing that the gate on the other end is open and there's apparently no safety protocols to ensure that it is so you could open the gate and then step through and just die.
Oh you know it could be underwater.
Or in space.
Or around a black hole in which case you die even if you don't enter.
Really they're actually quite dangerous technology and definitely not safe.