use_sync_jobs: true causing Max Nesting Level error

[andrewandante]

When developing I set:

SilverStripe\SearchService\Service\IndexConfiguration:
  use_sync_jobs: true

as advised in order to see results faster. However, this prevented me from publishing any page by throwing an Internal Server Error:

Nov 20 11:46:35 SilverStripe_log[2505]: error-log.ERROR: Uncaught Exception Error: "Maximum function nesting level of '256' reached, aborting!" at /var/www/mysite/www/vendor/silverstripe/config/src/Collections/MemoryConfigCollection.php line 125 {"exception":"[object] (Error(code: 0): Maximum function nesting level of '256' reached, aborting! at /var/www/mysite/www/vendor/silverstripe/config/src/Collections/MemoryConfigCollection.php:125)"} []

Occasionally the path changes but it always seems to point back to the ->getClassConfig() method on whichever class inevitably throws the error.