The current pre-release of the client ("pioneer" in the version) is only compatible to itself. So you can only play with other testers. Please be aware!
Locking the thread since it's moved off-topic and doesn't comply with the balance forum guidelines. Scorpion if you have a replay where the issue occurs then please made a post in the game issues part of the forum:
https://forum.faforever.com/category/8/game-issues-and-gameplay-questions
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