Block Editor bug, Which Roles to display, errors

In WP 6.0 I encountered the following errors attempting to use the new block (thanks for making a block for the avatar list btw!)

1: Which Roles to display displays no roles. No further options after choosing color. Delete the block, re-add it, and then the options display as anticipated. Interesting.

2: When changing the avatar size from 50 to about 150 the block crashed and displays: “This block has encountered an error and cannot be previewed.”

Thanks for your assistance, and the great plugin.