>>56030888This theory hasn't been mentioned much but I think the answer is literally OP's pic
When Magni revealed his 1.5 (more like 1.1) update, he got real serious out of nowhere and effectively said "I really had to fight for this" and mentioned how the powers that be gave him a '...why?' retort as if they didn't realize how bad his model was. He seemed pretty happy with his mini update though, so why did it take so long for him to disappear (aka shortly after Vesper revealed his model)?
Vesper likely told him he too was getting a model update, and Magni was maybe expecting a "1.5" update to vesper who actually got more of a 3.0 update and looks completely different. Both of them got ragged on pretty hard when Tempus was first revealed a year ago so they were likely both excited to get a complete makeover, however Magni didn't realize he was getting screwed over again at how he barely looks different compared to Vesper.
He probably then malded hardcore to all of upper management, who were already sick of him begging for a model update, Vesper probably stood in solidarity or whatever, Cover likely laughed their asses off at how childish this was and told them to chill out, only they both are still fuming over this and Cover is likely shrugging going 'k bye'
This might explain why there was no immediate termination, if it was some super serious NDA or any other illegal violation, cover had tons of time to terminate them long before Advent came out.