[Treemap] Text labels do not respond appropriately after "Group By" navigation

[brianblakely]

Bug Report

Steps to Reproduce:

1. Go to https://perspective.finos.org/block/?example=superstore
2. Open config panel for "Sales Report (by State)"
3. Reconfigure "Group By" field to Category > Sub-Category > State
4. Click "Technology"
5. Navigate back up a level by clicking "⇪ Technology"

Expected Result:

The current state of the treemap should look like the initial state (i.e. after step 3).

Actual Result:

My interpretation of the issue is that all text labels are rendering at max scale for this view, instead of responding to their respective cells and zoom levels.

Screenshots
Step 3:

Step 4:

Step 5:

Environment:

v2.7.1, tested on macOS and Linux in Chrome