diff --git a/frontend/src/components/project/partials/FilterInput.vue b/frontend/src/components/project/partials/FilterInput.vue
index e4221a1fc..cfb8bd92f 100644
--- a/frontend/src/components/project/partials/FilterInput.vue
+++ b/frontend/src/components/project/partials/FilterInput.vue
@@ -211,9 +211,9 @@ function handleFieldInput() {
 
 function autocompleteSelect(value) {
 	filterQuery.value = filterQuery.value.substring(0, autocompleteMatchPosition.value + 1) +
-		(autocompleteResultType.value === 'labels'
-			? value.title
-			: value.username) +
+		(autocompleteResultType.value === 'assignees'
+			? value.username
+			: value.title) +
 		filterQuery.value.substring(autocompleteMatchPosition.value + autocompleteMatchText.value.length + 1)
 
 	autocompleteResults.value = []
diff --git a/frontend/src/components/project/partials/filters.vue b/frontend/src/components/project/partials/filters.vue
index 7b5b87418..85da6412c 100644
--- a/frontend/src/components/project/partials/filters.vue
+++ b/frontend/src/components/project/partials/filters.vue
@@ -88,7 +88,7 @@ watchDebounced(
 		val.filter = transformFilterStringFromApi(
 			val?.filter || '',
 			labelId => labelStore.getLabelById(labelId)?.title,
-			projectId => projectStore.projects.value[projectId]?.title || null,
+			projectId => projectStore.projects[projectId]?.title || null,
 		)
 		params.value = val
 	},
diff --git a/frontend/src/helpers/filters.ts b/frontend/src/helpers/filters.ts
index d8e4b2bd5..87d2b7263 100644
--- a/frontend/src/helpers/filters.ts
+++ b/frontend/src/helpers/filters.ts
@@ -33,6 +33,7 @@ export const AVAILABLE_FILTER_FIELDS = [
 	...DATE_FIELDS,
 	...ASSIGNEE_FIELDS,
 	...LABEL_FIELDS,
+	...PROJECT_FIELDS,
 ]
 
 export const FILTER_OPERATORS = [