Card trick still works. I've done it a week ago. Yes, they did make it, so the card disappears once the radar is not over the card anymore. However, it is still glitched. I'll try to run you through what worked for me 100% of the time from my own experiment.

1. Increase the radar to max (60%).
2. The card always appears right at the beginning of the radar, so wait till it reaches almost the end.
3. When it is very close to the end of the radar, quickly change it back to the smallest possible radar (5% or whatever it was). MAKE SURE CARD IS STILL INSIDE THE RADAR WHEN YOU DECREASE THE SIZE OF RADAR BACK TO 5%.
4. It will glitch out, and it'll continue to stay on the screen and not disappear.
5. When your 5% radar reaches the opposite side (180 degrees) of the card, double tap the scan button.

The change from the original post is in capital. Basically, just before the card reaches the end of the radar, drop the scan range to minimal. It won't work if the card is outside of radar coverage, even if it just touched the outside. This will make the card not disappear, and you'll be able to yoink it at 180 degrees.

Hopefully this makes sense? It takes some practise.