After validation tableheader not shown

Hi,
I have an updatable table on my page with table headers specified by a method in the backing bean. When the validation fails, the error is put on top of the page, but all headers are gone? Does anyone know why and/or know a workaround for this?
P.S. I also tried replacing the headertext of the column by an outputtext in the header facet of the table, but this gives the same problems.

Hi,
the bean, is it in request scope ? Does it change if it was in session scope ?
Frank

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After validation tableheader not shown

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