I think it's good if the same bug is reported also on a per-site meta. (And I would not be surprised if somebody else makes a post about the same thing again in a few days - if it's not fixed by then.)
This perhaps does not fit the topic of this room perfectly - OTOH I wanted to find a room where I was able to ping you.
https://math.stackexchange.com/questions/3742596/prove-that-a-13a-23-cdotsa-l3-lefta-1a-2-cdotsa-l https://math.stackexchange.com/questions/78379/how-to-prove-sum-dn-tau3d-left-sum-dn-taud-right2 i think these are duplicates