If you keep hold of the edge just before you swipe to open it, a mini icon will appear, that icon allows you to switch sides and height of the edge panel. It's a discreet icon and you could have switched the edge screen position by mistake. Have a go...
Sebenarnya edge screen tidak hilang, hanya letaknya/posisi berubah sepintas seperti hilang, lihat dengan teliti : kanan/kiri/ atas/ bawah pasti ketemu. Atur kembali posisi sesuai keinginan.
Mine also went away. Hot it back by going to the "Edge" display under the display setting.
Then clicked on About Edge (BTW Edge display option was turned on when i iopened the the Edge display window. )
After clicking on the "About Edge" option and reading a little, I swipped to the left and all of the "Edge display options were there each panel had been unchecked. Recheck the ones you want and back out of the display settings.
Next notice that from the middle of your screen up to the top right corner, "Edge Display" will nop pull up. However if y ou
swipe slowly left on the lower 1/3rd of your home screen it now works again without issue.
Where as the upper half of the screen is now used to change pages and not edge display.
Hope this is of some help.
There have been many solutions for this problem ... and none worked for me. My edge screen disappeared on Sept 22, 2018 after Verizon ran an update. After reading a couple solutions and trying them all I decided to go to Settings -> Apps-> edge screen -> uninstall updates
This immediately brought the edge screen back. The update in question is 22.214.171.124 and seems to have given me the problem.
I have since downloaded the next update to the edge screen which is 126.96.36.199 and I have had no issues with the edge sceen since then. Hope this helps some that have found no other solutions.