Index: src/wp-content/themes/twentytwenty/style-rtl.css
===================================================================
--- src/wp-content/themes/twentytwenty/style-rtl.css	(revision 58796)
+++ src/wp-content/themes/twentytwenty/style-rtl.css	(working copy)
@@ -3286,6 +3286,11 @@
 	margin-left: 0;
 }
 
+.wp-block-pullquote[class*="-font-size"] p,
+.wp-block-pullquote[style*="font-size"] p {
+	font-size: inherit;
+}
+
 /* STYLE: SOLID BACKGROUND COLOR */
 
 .wp-block-pullquote.is-style-solid-color {
Index: src/wp-content/themes/twentytwenty/style.css
===================================================================
--- src/wp-content/themes/twentytwenty/style.css	(revision 58796)
+++ src/wp-content/themes/twentytwenty/style.css	(working copy)
@@ -3306,6 +3306,11 @@
 	margin-right: 0;
 }
 
+.wp-block-pullquote[class*="-font-size"] p,
+.wp-block-pullquote[style*="font-size"] p {
+	font-size: inherit;
+}
+
 /* STYLE: SOLID BACKGROUND COLOR */
 
 .wp-block-pullquote.is-style-solid-color {