I also tried with \s and without - the result is the same. (besides, how can you do without \n for the product name? - hint in onebox: "If the information
is not on the same line - please use the character '\n'")
In addition, for example, everything works correctly for client fields:
Client Name:\s[client_name_first\s]
Client Phone:\s[client_phone\n]
PS: for example, in the topic
https://crm-onebox.com/ru/support/email/3980-kak-polzovatsya-preg-shablonami/ it was you who gave the template:
"
PREG template for product data in process:
Product Name:\s[product_name\n]
Product price:\s[product_price\n]
Quantity:\s[product_count\n]
"
PPS: yes, in that question, the products also didn’t pull up as a result