One of my clients experienced the exact same thing. I tried every trick imaginable, but wasn’t able to figure it out. Definitely a bug. I had them submit a ticket yesterday completely bizarre.
Source was Google sheets.
It didn’t matter whether the screen was sourced from the sheet or I had an in line list, pointing to the sheet, clicking on a list item, directed me to the detail screen of a completely different sheet.
Was the component previously copy/pasted and then modified? Recently I’ve seen components hanging onto original settings/sources after being copied and pasted elsewhere. The component had to be completely removed and re-added in the new screen to grab the right data.
No, as a workaround, I’ve tried to recreate it again and again. As a Detail screen with inline component and as a calendar type screen with same behavior. I’ve recreated a whole table to test if it can help. No success at all.