Hi Diego,
Unfortunately I was not able to reproduce this bug. The things I tried were as follows;
I created a new empty project with starter content. After that I created a new Niagara system based on Blowing Particles template. This template has WindForce on it by default. The system was created fine, and after dragging it into the scene it displayed fine. PIE also worked properly, with no warnings. After this, I thought to close the editor and restart, with the default map set to my test with the effect in it. Everything was still working. I then made a second system based on the default system, and manually added WindForce to it, then repeated the same steps, and still no dice.
This all being said, I dug into some case history, and it seems you’re not the only person to have seen this. Here is a case logged just two days prior to your own that seems eerily similar.
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If there are any other details you can think of that would help get out a reproduction case, they would be much appreciated.