World Editor: Constantly selecting things that I don't select

I've heard people mention that the editor selects/deletes things once you have a "lot" of items.

Well recently whenever I select objects the Scene Tree on the right side shows that I've selected other objects too.

I.E. I select a CURB but then two or three things show up selected on the scene tree!

I've noticed things constantly being deleted or moved and never reeeaallly understood why until now. It seems to have started happening since 0.16 though, never happened before that when I had MORE items in the map.

Am I alone with this?

 

If you have say 10,000 items, and 10,001 breaks it but you don't notice until 11,500 items it would make sense to me that what is happening is unique identifiers are being duplicated, and so removing items back to 10,000 wouldn't solve that because the original name would still exist, you would have to go back much further in that case - as well explaining why even though I deleted a bunch of old items to replace with newer - fewer - items, it still happened to me.

I guess just coincidence with the updates as only recently have I added a few thousand more objects. As for forest items. . . never will I ever try to place forest curbs, placing and manipulating forest items is a headache I don't need. Trees that are randomly sized and rotated, sure np, anything that needs to be in a specific place nooooo thank you.

Sad to see that it has been an issue for so long and that nobody seems to really know what/why.

I remember you specifically fufsgfen mentioning random items deleting, and I didn't think it was happening in this way, but it makes perfect sense now.

If I place five curbs, then select all five manually, but then check the scene tree, I've selected a bunch of decal roads, particles, lights, etc.. even though they don't seem to get modified when I move or delete the five curbs I've initially selected. It's all very strange!