WordPress 5.9 Archive Block

After upgrade to 5.9, the “Archive” block has started adding a title, “Archives”. On examining the HTML code, there is a class missing from the 5.9 version, see below.

Before upgrade:
<aside id="block-13" class="widget widget_block widget_archive"><div class=" wp-block-archives-dropdown"><label class="screen-reader-text" for="wp-block-archives-61f2ddc72ff4f">Archives</label>

After upgrade:
<aside id="block-13" class="widget widget_block widget_archive"><div class=" wp-block-archives-dropdown wp-block-archives"><label for="wp-block-archives-61f2dcbd374b6">Archives</label>

Note the missing “screen-reader-text” class declaration in “label”. Adding it back causes the title to disappear. In the meantime, have added the following to Additional CSS in the customizer give the same result.

/* Lose the title associated with the "archive" block */
.wp-block-archives label { display:none}