Beta: Importing dataset when micro:bit is connected is unresponsive

[microbit-grace]

Repro steps

1. Visit https://createai.microbit.org/v/beta/data-samples (data samples page)
2. Connect a micro:bit
3. Click the three dots > Import data samples

See the web app be unresponsive.

Similar issue seems to occur when trying to import project from homepage whilst a micro:bit is connected.

Occurs on Mac Chrome

[microbit-grace]

Seems related to the finder crashing issue when a micro:bit is connected via WebUSB.