"Expose on Spawn" variables in Actor Components are overridden by the value set in their Details Panel when called in another Blueprint.
This issue was reported and tested in 4.20.1 (CL-4233996). This was reproduced in 4.19.2 (CL-4033788) and Main 4.21 (CL-4247867)
Results: The value of the details panel value will be printed.
Expected: The value of the node input should be printed.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-62458 in the post.