The problem can be demonstrated by entering a Vendor Name or Product Name and then displaying the results for some Vendors and Products with more than one record. Thanks to Laura Nasipak of eClinicalWorks who discovered this problem. She has been in contact with ONC and they are working on a fix. I have verified that this impacts multiple Vendors (including GE Healthcare) and Products (including Centricity EMR 9.5).
If you are unable to find your vendor or product, the workaround is to change the number of records to display from 25 (the default) to 200. If you still cannot find your vendor, try browsing the entire list.
The two screenshots below illustrate the problem and work-around (click on the images to see them full-size).