NEW BUG Last post isn't accurate

Summary:
Clicking the last post button from the main index doesn't lead me to the acual post that it indicated. This has caused me to erroneously reply to a post in the middle of a thread instead of to more recent discussion. If I noticed the weirdness before posting, I'm forced to manually scroll and jump pages to get to the end. Seems un-intuitive.

I clicked the icon next to TY's name in this:



And ended up here:


Bug type:
Usability I guess?

Steps to Reproduce:
Be on index. Click a last post button.

Reproducibility:
I think it happens regardless of mobile or desktop. It only seems to happen when I haven't viewed all posts in a thread.

Expected Results:
I expected to and wanted to end up on the last post, as advertised. I don't care to read through all posts since my last login on pc or something in the DCC. Or any thread for that matter. If the index indicates a button to go to the last post, then take me there please :)

Device Configuration:
iPhone, Safari.

Theme Used:
Sweet Kisses but it's the same on any theme I'm fairly sure.

A development issue, but not specifically one caused by the UI.