After reaching Rubedite tier in the ranked games, my bar was still stuck at Voidsteel 920/1000, and I didn't received the achievement, or the stones. Logging out and quitting the game, didn't fix it, and I even waited 30 minutes in case the bar progress had a visual bug that showed progress belatedly. I played another game, and re-reached Rubedite tier, and the achievement still didn't show. It took me literally 5 hours from Voisteel to Rubedite, and I'm not about to do this again since I find pvp card games extremely stressful, and I only wanted to do them in order to have the achievement and never have to deal with them again. The whole achivement took 3-5 hours per day for more than a week. Please, can support sort this out, it's so extremely disappointing after all that time, effort, and stress to have a bugged achievement. I'm so glad I took screenshots, here they are: