This means that these classes you use were used ages before, but sometimes they don't do it. You should improve your template. It is possible, in my template it does not cause any issues.
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This article is from 2015 and has the same issue. It is not due to the age of the articles. For example, your template handles correctly this article from 2009 https://instantview.telegram.org/contest/prohardver.hu/template18/?url=https%3A%2F%2Fprohardver.hu%2Fhir%2Fa3-as_formatumu_lezernyomtatok_az_epsontol.html
This means that these classes you use were used ages before, but sometimes they don't do it. You should improve your template. It is possible, in my template it does not cause any issues.