Repeated Table Head ignores counter-increment

I encountered a problem when using ```-fs-table-paginate: paginate;``` in combination with css counters. it seems, that the repeated table head of every page is only rendered/evaluated once per table.

example code:
```html

table {
page-break-after: always;
-fs-table-paginate: paginate;
}
table::before {
/* uncommented next line for demonstration */
/* counter-reset: sub 0; */
counter-increment: sub;
content: '';
}
table th::before {
content: "Table Page " counter(sub);
}
table td::before {
counter-increment: sub;
content: "Counter Value " counter(sub) " ";
}

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```
[exampe.pdf](https://github.com/danfickle/openhtmltopdf/files/1198387/exampe.pdf)