The code is using Environment object to pass Test objects between Actions Micro Focus has stated in an old documents (KM195104)

The Environment parameter is not designed to hold this data type (test
objects) or to be used in this manner. In some cases, passing objects
between actions using this method may work, in others it will not. (The
exact situations where this may work is not known, nor has it been
tested.)
In general, test objects should not be passed between actions at all.
Mercury recommends using shared Object Repositories rather than the
following solution. This solution does not pass the actual test object from
one action to another. The Environment variable holds only the path to the
test object. The test object is actually created and used only in the
second action.