Created new broadcast and send immediately to all subscribers in a newsletter group.
Created 4 subscribers to a newsletter then broadcast an email to the subscriber group.
My issue, 1st time broadcast, 3 got email, 1 nothing.
2nd time, only 1 receive the email. Other 3 nothing.
Repeat the same process a couple of times and got inconsistent results.
Is this issue related to the plugin. Anyone got any suggestion ?
The value of column wpr_queue.sent = '1' for all records.