Did they remove all the English chapters?
I think this was one of the many titles that was being scanslated by Asmodeus Scans. They'd been paywalling their releases on their website and refusing to upload them in a timely manner on MD. They got warned for it, but after paying lip service to that warning, they went and doubled-down.
MD can no longer afford to tolerate this kind of behavior from the scanslation groups because it attracts the unwanted attention of the publishers. Scanslation as a hobby is one thing, but trying to make money off of it (effectively bootlegging) will eventually draw the attention of publishers and their lawyers. It was one of the main reasons why MD got hit with all those DMCA take downs last year.
MD wants as many people scanslating and uploading as possible, but if a single group is disregarding this very real and pertinent issue in favor of profit? Then its better to cut them away, even if it means losing all of the content they've uploaded to MD. The risk of loss from another copyright strike is all too real, and the losses incurred from another one would be far more devastating than the losses that would result from banning a troublesome group.