Cannot isolate multiple trees + bug with placeholder

[desire]

For my UI I require two trees. One for "Inflow" and one for "Outflow".

Upon building this I see I am able to drag from one tree to another. I do not want this behaviour: Instead I want to be able to ignore it if it has been dragged onto the other tree.

Additionally I am seeing there is an issue where the placeholder shows up on both trees.

CleanShot.2023-10-12.at.18.25.16.mp4

[minop1205]

@desire Independence of multiple trees will not work at this time. Also, the placeholder bug has not yet been remedied at this time.

In both cases, we have tried to fix them in the past, but it was not possible to do so immediately due to the need to redesign some parts of the system.
We will try to fix them again at a later date, but it is unlikely that we will be able to begin immediately.