Miele G6890 SCVi K20, items ending up in drain pump.

I’ve had a Miele dishwasher (Miele G6890 SCVi K20) for 3 months, and this replaces a cheap Zanussi. The problem I have is random items ending up in the drain pump. This includes a rivet from a knife handle, a fixing from a saucepan handle and various small pieces of plastic. Each time the pump becomes very noisy. I’m removing something every other week. This never occurred once over 14 years with the Zanussi.

I’m interested if:
– Other Miele owners see the same.
– There is a workaround for the problem.

In the sump under the micro filter there is a path into the drain pump. What puzzles me is that there is nothing stopping the items passing down through the micro filter. There’s a sort of catch pot in the middle but clearly not effective. I would post a photo but I’m limited on my upload size.
Here is an example of the Miele micro filter: https://shop.ukwhitegoods.co.uk/04011464-miele-dishwasher-microfilter.

The micro filter on my old Zanussi had a cap on the top and this caught any such items from going down into the sump. Here’s an example of that micro filter: https://shop.ukwhitegoods.co.uk/1118754108-zanussi-electrolux-aeg-dishwasher-filter.

Why does the Miele filter allow solids to pass down to the drain pump? Is the intention that some solids will be pumped down the drain?

It seems I need a similar ‘pepper pot’ cap on the Miele micro filter, like I had with the Zanussi.

Cheers,
Stuper.