USER_SHORT_HELP not viewed in client application

I filled in the element USER_SHORT_HELP for a database field but nothing was shown in the client application. USER_LONG_HELP shows tooltip fine, but USER_SHORT_HELP does not seem to work even though it is present in the source file:

<Root>
  <Documentation>
    <Data>Name of Person or Company</Data>
    <Category>USER_SHORT_HELP</Category>
    <refSchemaItemId>57ace120-949e-443b-aa52-60c55eee3cc6</refSchemaItemId>
    <Id>86d05c33-7612-4344-bddc-fb056c90a04f</Id>
  </Documentation>
  <Documentation>
    <Data>Name of physical person or company</Data>
    <Category>USER_LONG_HELP</Category>
    <refSchemaItemId>57ace120-949e-443b-aa52-60c55eee3cc6</refSchemaItemId>
    <Id>9a60764a-9d91-4683-bda3-f9e4247c137b</Id>
  </Documentation>
  <Documentation>