Evo Bug "I'll protect you"

I am facing a problem related to the "I'll protect you" evolution. At stage 4 of the evo the objective to assist two goals is not counted as completed. It shows the objective as completed in match but it does not count wehn the game is finished. I also get a message after the game in the post mazch screen that there was a problem related to "server-validation". 

What I already tried without any success so far:

• - logged out of my account and logged in again
• - paused the evo and resumed it
• - paused the evo started a different evo with another player, paused that evo after the first objevtive and resumed the former evo
• - stopped scoring after having achieved exactly 2 assists (in game objevtive was not marked as completed; result: no error message but also objective not completed)
• - stopped scoring when the objective was shown as completed ingame (which is not after 2 assists but randonly after sometimes 3, sometimes 5 assists) result: error message in the post match screen and objevtive not completed

It is very(!) frustrating spending 100k coins on an evo and then having it bug out so I hope this will be fixed asap.