Przedszkole question: normal to have a rule for not talking during meals?

Cześć wszystkim, I recently moved back to Kraków with my 3 year old son. He has been at the same school since May 2024 and doesn't often share much about his day at preschool other than to say he's sad because he misses mama and tata.

Recently he started yelling at us at home during meals if we talk, because apparently the rule at his preschool is not to talk during meals. Is this normal? He's getting really disstressed if we talk at all during dinner and I've never encountered this rule before.

Any insight about this will be very helpful.