I think you're seeing this bug: "Field-specific error not shown when AJAX used". It's been partially fixed in 5.4-beta-26, but there's still an issue.
https://issues.apache.org/jira/browse/TAP5-2391 Geoff On 13 Mar 2015, at 1:41 am, Ilya Obshadko <ilya.obsha...@gmail.com> wrote: > I've found out that at some point (not sure, but probably after upgrade to > 5.4-beta-22), custom form validation errors stopped displaying on related > fields. Effectively this breaks proper display of validation errors in any > form not using <t:errors/> component. > > I'm wondering if this is already fixed in 5.4-beta-26? > > -- > Ilya Obshadko