luceos Kamiw a similar issue has not been reported before, but I also know of no one running percona on v1. At Blomstra we were using Percona, but we have just migrated to MariaDB ahead of the upgrade to Flarum v1 for our clients; so I cannot confirm this issue for you.
Kamiw luceos Thank you for replying, That is a helpful info,I'll try to upgrade Percona MySQL version or change to another version Thank you!