Yeah, that’s what Google Translate said as well.
It just seems odd that they wouldn’t know the symptoms at the time of death (at least for the vast majority of cases, as opposed to the ca. 30-40% of deaths each day that appear to be labeled like this). If they weren’t able to identify any COVID-related symptoms by the time the person died, well… (also, I’m not sure what further investigation they could do at that point)