Removing a node seems to place an item at the end of the list, not remove it

[marcellamaki]

Observed behavior

Observed in the Aug 20 bug bash

Expected behavior

The user should see a node removed from the tree when they delete it (even if the removal is managed async).
There should be no error on the console changeTracker.cleanup is not a function

User-facing consequences

Confusing for the user as to whether or not the node has been removed.

Errors and logs

Video

Steps to reproduce the issue

Not clear to @AlexVelezLl how he got into this state, so needs to be reproduced.

Usage Details

Studio unstable

[rtibbles]

Possible this is the same underlying issue that was fixed by this: #4667 - so this may be fixed on unstable now.

[radinamatic]

Unable to replicate this anymore, so closing but will keep an eye in case that error resurfaces somewhere.