Hi Can you add me in your project? I will have a look Or you can share with public. Any Images? if you shift+b rebuild the copper area does it still exist? if you can provide us the PCB file will be better. Thank you

@BBelk, Can you try on an up to date version of Firefox (v64) or Chrome (v71)?

@UserSupport Hi I've found it very difficult to add in users, can you tell me how to add you in? Here's how I think I unintentionally broke it: I think it has to do with moving a island with the arrow keys. I highlighted one island I wanted to copy, was able to copy and move to another location, off the pcb then back on, then paste it where i wanted it, renamed it, but after that it would never pour that area correctly, even after deleting the island and starting with a new island. It acts like a permanent ink island...The other islands on the board are fine, I can reshape, re-build copper area, etc, works. You might be able to try it there, create a multi component design, choose a few components to create a island with, then move the island around with the arrow keys, see if the main copper will re-pour around it. Try moving it off the ground plane pcb area (outside the board outline) then back on. I don't think its a browser issue, it acts more like either the other island is still there somewhere, maybe on a invisible layer...or is that lair? lol

Hi 

@UserSupport Added... 

Hi Your U2 pad is top layer, but you haven't create the top layer copper area net name as +5V  so, the ratline still exist. after add copper area: 

Hi Support, Actually my problem is on L2-2. You can see the islands were created for L1, L3 & L4 a island outline is there but it won't create the island for L2. Thanks