Jalview freezes when trying to display all alphafill structures for example alignment

Import the example feredoxin alignment.

Select all but the O808829_MAIZE sequence (which avoids JAL-4041).
1. First retrieve and show all alphafold structures via 3d-beacons.
2. Now retieve and show all alphaFill structures - adding them to the same structure viewer and ensure superpose structures is enabled.

Jalview hangs somewhere between the third or fourth structure being added. Thread dump sugests seems to be that Jmol is still rendering when Jaview is trying to call the 'getMapping' method.