Salient 8.5.4 is Now Compatible with Woocommerce 3.3.1 . Kindly update the Theme if you have updated Woocommerce . 

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strange icons on iOS

Please check your .htaccess file in the wp-content folder and check if it has any below security code that is blocking specific ttf filetype .

Order deny,allow
 Deny from all
 <Files ~ ".(xml|css|jpe?g|png|gif|js|svg)$">
 Allow from all
 </Files>