Checking my apache logs, it appears the monero adapter is causing a warning:
[Mon May 06 19:52:07.951450 2019] [php7:warn] [pid 31168] [client xxx.xx.xxx.xxx:49216] PHP Warning: Invalid argument supplied for foreach() in .../wp-content/plugins/wallets-monero/includes/coin-adapter-cryptonote.php on line 396, referer: https://mysite.com/wp-cron.php?doing_wp_cron=1557172327.1479079723358154296875
Monero Adapter Status is reporting “Responding” without any errors.