There’s likely a cleaner way to fix this, but here’s what I have added to my child theme to eliminate them for now.
.widget {
-webkit-hyphens: none !important;
-moz-hyphens: none !important;
-ms-hyphens: none !important;
hyphens: none !important;
word-wrap: break-word;
}
.entry-content,
.entry-summary,
.page-content,
.comment-content {
-webkit-hyphens: none !important;
-moz-hyphens: none !important;
-ms-hyphens: none !important;
hyphens: none !important;
word-wrap: break-word;
}