Via the App Store reporting
"Al momento de copiar un texto y pegarlo en otro lado, las letras como la “ñ” o los tildes “á,é,í,ó,ú” no se pegan, sino salen signos raros como árabes" See

Context:
iPhone X
6.4.0 (1671)
iOS 13

Steps to Reproduce:

1. 1. Go to an article in a language with diacritics or accent marks
2. Attempt to select the text and open the text context menu
3. Try to copy the text

Actual Results:

Selection is lost and highlight menu closes without text being copied to clipboard

Expected Results:

1. Selection is lost and highlight menu closes after Copy option is tapped and text is copied to clipboard, including diacritics, unicode characters, etc