Why doesn't TV check work?

Question

MODX

There is such a chunk. It is used in a price list whose header cells are derived from child resources.

<th>
  
  [[+menutitle]]
</th>

If we substitute some pagetitle instead of the specified TV, then everything works. I tried to write the condition on the contrary, with notempty, the same result.
The conclusion is:

[[getResources? &parents=`2` &tpl=`priceListHeader` &resources=`-351,-352` &sortdir=`ASC` 
&includeTVs=`priceModelHeaderValue` &prepareTVs=`1` &limit=`0` &depth=`0` 
&showHidden=`0` &sortby=`menuindex` &where=`{"template:=":10}`]]

Answer 1

&includeTVs=`priceModelHeaderValue`
&prepareTVs=`1`