Sequencer unable to bind channel of a value that is part of a TArray

Keyframes added to sequencer from a TArray variable are unable to be changed. The value sets correctly but displays red.

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1) Create a new C++ actor, add the attached code
2) compile and place the actor on the scene and select the actor
3) on detail panel , add an new ActorsToTracks item and change value and with opened sequencer try to create an keyframe to the sequencer

Result: channel is not bound correctly when create keyframe is added on the sequencer

Expected: To be able to add and change keyframe in the sequencer