Reproduce:
1. Open aggregations

2. Add a stage ($match for example)

3. Edit it to have an unbounded array in the stage, like:

4. Switch tabs
5. Go back to the last tab, observe it's crashed and progress is lost. (screenshot)

Not sure if this is a new bug or not, but it does seem like it's a rough experience blocker, so I marked it p2. Feel free to bring to a p3.
*edit Looks like its this line: https://github.com/mongodb-js/compass/blob/becf73a74630e8676f6abde92fd5000064fd2ea8/packages/compass-aggregations/src/components/pipeline-builder-workspace/pipeline-builder-ui-workspace/index.tsx#L123