Views is disappearing contextual filters. This is a serious issue.
As an example, I've been working with several contextual filters in a view (which are running unusably slowly, see https://www.drupal.org/node/2909985). After making some edits to test in the preview, I pressed the Cancel button to revert to the previous usable version of my view.
Upon editing the same view again, it does not show contextual filters that I had saved in previous editing. Note that the contextual filters still seem to be working, as when I test in the live site they still take effect.
As a result Drupal Views does not show the contextual filters, and I am not sure how to edit them further.
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Comment #2
eaglegamma CreditAttribution: eaglegamma as a volunteer commented