fire_projectile will not accept player in Grid Mode

Does the issue occur in the editor or during gameplay?

gameplay

If it's a gameplay issue, please specify which movement system and camera type you're using (free movement vs. grid movement, third-person vs. first-person) or N/A if not applicable:

Grid Based

Briefly describe the issue you're experiencing:

fire_projectile does not work when using player as a source entity, while in Grid Mode.
The same command when in FM will actually fire the projectile.
In Grid, the below error is shown in the terminal instead.

Are there any errors in the in-game debug console or external console window?

Provide the steps necessary to reproduce the issue:

1. Create a bare bones project with a player model and a projectile model/item
2. Play in Grid
3. Use console to type fire_projectile("ITEM_0001", player)
4. no projectile will fire...error in terminal
5. replay in FM
6. Use console to type fire_projectile("ITEM_0001", player)
7. projectile will fire.

Provide a download link to the bare bones project (strongly recommended if it's an in-game issue, since this helps significantly when attempting to reproduce it; the report will also be given more priority in this case):

Will need some time to set one up. Will add later.