Trigger Definer Already Same But User Still Denied currently I already have user like this 'app_user'@'10.148.0.0/255.255.240.0'
and I have the trigger with definer like this
CREATE DEFINER=`app_user`@`10.148.0.0/255.255.240.0` TRIGGER usertable_delete_audit

but when apps insert data i got this error
trigger command denied to user 'app_user'@'10.148.0.0/255.255.240.0' for table user table.

i already make sure about the grants this user already full grant.
GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, REFERENCES, INDEX, ALTER, CREATE TEMPORARY TABLES, LOCK TABLES, EXECUTE, CREATE VIEW, SHOW VIEW, CREATE ROUTINE, ALTER ROUTINE, EVENT, TRIGGER ON

this impact from user with specific host ? i mean because the user have grant like this 10.148.0.0/255.255.240.0. And the trigger only can give the access from specific ip from server apps ?
my server apps ip 10.148.0.57
i using mariadb version 10.4
Per documentation on create user, netmasks are only valid on the previous class A,B,C addresses. So masks such as 255.255.240.0 are invalid.
I haven't found a feature request for this feature, however obvious it seems, on https://jira.mariadb.org if you'd like to request one.