I see the same thing when using Firefox or Chrome browsers on my Android phone.
Lines only appear when signed in to my account and searching when using the mobile browser version of the page.
If I change to "Classic Site" using the link at the bottom of the page, I am able to see results. Also, if I request a desktop site version of the page, the results appear.
The eBay app does not appear to be affected, and searches appear OK.
