From the article:
But the British-made plows on the Leopard 2Rs and Wisent clearly missed more than a few mines. Three Leopard 2Rs and a Wisent struck mines, as did several M-2s. Trapped and under fire, the battlegroup fell apart. Crews bailed out of their disabled vehicles, dragging their dead and wounded with them. A rescue force riding in M-2s scooped up many of the survivors.
This reads as materiel failure or usage failure which is unfortunate with "new" equipment. Which is to be expected, and can be remedied by learning the correct lessons. Something that both sides seem to be capable of in this conflict.
To Tokmak and beyond