I played today a game
Time 18.40 (GMT)
After conceded a goal at 49' (in a usual troll game where I had +40% quality and opponent wasn't present )
I made a sub, switching my DC Colovati with an AMC Snejder (first I moved my DMC in the position of DC).
As you can see, I could watch my sub playing in the game.
Click image for larger version.  Name: SUB 1 67 SNEIDER.jpg  Views: 31  Size: 53.1 KB  ID: 113340

But later, when I saw that I couldn't score, went again in formation's screen and saw that this sub never happened.
Colovati was still in the game, in the AMC position (where Sneijder should play)
Click image for larger version.  Name: SUB 2 80 COLOVATI.jpg  Views: 32  Size: 54.6 KB  ID: 113342


Then I made the sub , this time Roben instead of Colovati and it worked (except that I didn't win ).
Click image for larger version.  Name: SUB 3 87 ROBEN.jpg  Views: 32  Size: 53.0 KB  ID: 113344

Click image for larger version.  Name: SUB 4 GAME.jpg  Views: 31  Size: 49.1 KB  ID: 113346


Me as many other managers have a lot of expectations from TE 2019 but the two most important things is to fix the bugs and to fix the game (random) results.

Cheers

* Sausy, you have the ID of my team