RSRP-469016: Usage of deconstruction extension method breaks many refactorings

Think I finally found the culprit for the silent refactoring failures I've been experiencing (probably explains DEXP-303632 and others, though I'm not certain whether deconstruction extensions were involved there).

Just about any refactoring that involves Class1.Fun in the example below will do nothing (e.g.: 'Extract method' after selecting the body of Fun, inlining Fun into another method, 'Extract superclass' (non-abstract), 'Move class to matching file' after renaming Class1 to Class2, adjusting the namespace to the file location, ...).

    using System.Collections.Generic;

    namespace Example
    {
      public static class KeyValuePairExtensions
      {
        public static void Deconstruct<TK, TV>
          (this KeyValuePair<TK, TV> kvp, out TK key, out TV value)
        {
          key = kvp.Key;
          value = kvp.Value;
        }
      }

      class Class1
      {
        public int Fun(KeyValuePair<int,int> kv)
        {
          var (k, v) = kv;
          return k + v;
        }
      }

    }