Fix initial read of configuration configmap

[aledbf]

Which issue this PR fixes: fixes #2689

[k8s-ci-robot]

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[codecov-io]

Codecov Report

Merging #2692 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2692      +/-   ##
==========================================
+ Coverage   40.96%   40.97%   +0.01%     
==========================================
  Files          72       72              
  Lines        5080     5081       +1     
==========================================
+ Hits         2081     2082       +1     
  Misses       2712     2712              
  Partials      287      287

Impacted Files	Coverage Δ
internal/ingress/controller/store/store.go	58.85% <100%> (+0.12%)	⬆️

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