Research problem with Obj. 292

Hi guys, I am a newbie in the game. I have a question about this Obj. 292
I researched all modifications of this tank but when I saw match results all resarch points that I earned by this tank are gone :( I have only 1 high tier tank in the USSR tech tree but I can’t make any progress in the tech tree. Do you know where is the problem? Can’t we grind with this tank?

It’s not a premium tank so you get research penalty - 80 or even more %

ow I wasn’t know that now I am so sad :( thank u for your time

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