Steps to Reproduce

Reference: B80-ZK-2923.zul
1. Textbox with @load but not save yet

<textbox value="@load(vm.account.code) @save(vm.account.code, before='other')"/>

(Type something in the textbox)
2. Trigger command to do NotifyChange by the expression
(set null)

Current Result

value remained in Textbox

Expected Result

shall clear

Debug Information

because the value in vm is the same, so the load binding is not triggered