Challenge completion is glitched after the 4th completion. Stays at 3/4 and does not allow you to earn above 8.80x . Literally demanding 57 games max ( 176 rep on loses) equates to 9.5 hours of IB straight. This has been ALLL over Reddit, Twitter, The help forums & there has been literally zero acknowledgement of it.
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I got this last night too :((