This is where you can track progress on bugs: https://issues.unrealengine.com/
But it’s not there. 
I think they didn’t do or report anything because it’s not there… 
To anyone stumbling upon this thread and bug: Since there’s no place where you can upvote its importance, It’s probably helpful if you report this bug too. Here’s how:
https://www.unrealengine.com/en-US/support/report-a-bug
And it makes sense to include a link to this thread. I have forgotten that when reporting the “CellIndex < CellIndexMax” bug.