Rubber ring - blue -?

My wife found a royal blue rubber ring, approximately 8-inches in diamter on the bottom of the tub between the heater and below the spray arm. Is this a part of the dishwasher? If yes, where does it go and how would I reattach/reinstall this part?

Please see the attached pictures.

Thanks in advance for your help!!
ring 1.jpg (27.6 KB)
ring 2.jpg (38.1 KB)

Hi there,
I have exact same problem. Ring is not broken and assume I overloaded one of the dishwasher racks. If you have figured out where the ring goes I would appreciate any help. Take care

Here are ypur parts
Replacement parts for Whirlpool DU948PWPQ2 UNDERCOUNTER DISHWASHER | AppliancePartsPros.com

It does not look like you will get a reply.

I do not know where it goes as it seems too big.
If you click on the picture pump cover seal (Item 13 in Section 4) a new page will open with info on it.
Problem is it looks smaller (~5.5 inch diameter) using the grid which is 1 inch per square.

i found the SAME exact ring in my kenmore. But I have looked at the parts list and cannot find where it goes or a replacement. Did you find an answer?