diff --git a/packages/form-core/src/choice-group/ChoiceGroupMixin.js b/packages/form-core/src/choice-group/ChoiceGroupMixin.js
index 09b900051..d05fa348a 100644
--- a/packages/form-core/src/choice-group/ChoiceGroupMixin.js
+++ b/packages/form-core/src/choice-group/ChoiceGroupMixin.js
@@ -94,10 +94,7 @@ export const ChoiceGroupMixin = dedupeMixin(
 
       connectedCallback() {
         super.connectedCallback();
-
-        this.__registrationCompleteTimer = setTimeout(() => {
-          this.__resolveRegistrationComplete();
-        });
+        Promise.resolve().then(() => this.__resolveRegistrationComplete());
 
         this.registrationComplete.then(() => {
           this.__isInitialModelValue = false;
@@ -110,7 +107,6 @@ export const ChoiceGroupMixin = dedupeMixin(
           super.disconnectedCallback();
         }
 
-        clearTimeout(this.__registrationCompleteTimer);
         if (this.registrationComplete.done === false) {
           this.__rejectRegistrationComplete();
         }
diff --git a/packages/form-core/src/form-group/FormGroupMixin.js b/packages/form-core/src/form-group/FormGroupMixin.js
index a50ec76ed..4339fc356 100644
--- a/packages/form-core/src/form-group/FormGroupMixin.js
+++ b/packages/form-core/src/form-group/FormGroupMixin.js
@@ -154,10 +154,7 @@ export const FormGroupMixin = dedupeMixin(
       connectedCallback() {
         super.connectedCallback();
         this.setAttribute('role', 'group');
-
-        this.__registrationCompleteTimer = setTimeout(() => {
-          this.__resolveRegistrationComplete();
-        });
+        Promise.resolve().then(() => this.__resolveRegistrationComplete());
 
         this.registrationComplete.then(() => {
           this.__isInitialModelValue = false;
@@ -175,7 +172,6 @@ export const FormGroupMixin = dedupeMixin(
           document.removeEventListener('click', this._checkForOutsideClick);
           this.__hasActiveOutsideClickHandling = false;
         }
-        clearTimeout(this.__registrationCompleteTimer);
         if (this.registrationComplete.done === false) {
           this.__rejectRegistrationComplete();
         }