[R&F] [bug] Surplus Logistics doesn't add +2 food to trade routes from starting city

[kaspergm]

I noticed yesterday than when I pick the promotion on Magnus that should add +2 food for starting city to trade route yields, this effect doesn't actually appear in game. Here is a screenshot that shows that I have the promotion on Magnus:
https://imgur.com/IXyp0TE

Magnus is stationed in Nongama, and I want to create a trade route from Kwadukuza to Nongama, yet the trade route panel says only +1 food yield:
https://imgur.com/wA0qhJo

To test if this is only a display bug in trade route panel, I see what food yield is in Kwadukuza before making trade route. Kwadukuza has +10.6 food:
https://imgur.com/miFDTQt

After making the trade route and waiting for next turn, food yield is +11.9 food, consistent with +1 food from trade route + percentage modifiers:
https://imgur.com/8vejGh1

 

[the_sun]

[NFP]

Magnus's +20% bonus does not apply. Am not sure about the +2 food ability. I played as Maya.