diff --git a/apps/full-site-editing/full-site-editing-plugin/jetpack-timeline/blocks/src/editor.scss b/apps/full-site-editing/full-site-editing-plugin/jetpack-timeline/blocks/src/editor.scss
index 373500e28720c..d010757ce7f83 100644
--- a/apps/full-site-editing/full-site-editing-plugin/jetpack-timeline/blocks/src/editor.scss
+++ b/apps/full-site-editing/full-site-editing-plugin/jetpack-timeline/blocks/src/editor.scss
@@ -2,6 +2,11 @@
 [data-type='jetpack/timeline'] {
 
 	// Always show the Timeline appender, even when a child block is selected.
+	.block-list-appender {
+		display: none;
+	}
+
+	&.is-selected .block-list-appender,
 	&.has-child-selected .block-list-appender {
 		display: block;
 	}
@@ -19,6 +24,9 @@
 	padding-left: 0;
 	padding-right: 8px;
 
+	// Temporarily make this important. It can be retired once this custom appender is replaced with the real one.
+	animation: none !important;
+
 	&:hover {
 		color: #fff;
 	}