fix(vue-app): don't fetch payload on first spa fallback render

[Atinux]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

Fixes #7648 (un-necessary payload fetch on spa fallback)

Checklist:

• All new and existing tests are passing.

[codecov-commenter]

Codecov Report

Merging #7657 into dev will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev    #7657   +/-   ##
=======================================
  Coverage   70.18%   70.18%           
=======================================
  Files          88       88           
  Lines        3756     3756           
  Branches     1020     1020           
=======================================
  Hits         2636     2636           
  Misses        911      911           
  Partials      209      209           

Flag	Coverage Δ
#unittests	70.18% <ø> (ø)

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