Map jumping / zooming out when trying to zoom in

  1. Tap on a 30-min walking segment
  2. Tap extract brief visits
  3. Try to zoom in on the map to see exactly where one of the extracted visit suggestions is
  4. The map fights me and zooms back out!

This also happens when I’m splitting a segment. Forces a zoom out if I’m using the physical toggle. Forces a zoom in if I’m using the nudge arrows.

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@Fly Thanks for the precise repro — that’s genuinely helpful.

We can reproduce the split-segment one: with the content sheet at its default (middle) height, the map re-fits and undoes a manual zoom a moment later. Filed as BIG-574. We haven’t pinned down exactly what’s triggering the re-zoom yet — the obvious suspects in the code don’t quite explain what we’re seeing, so it’ll need a bit of instrumented digging to catch the actual culprit. But it’s a real bug, it’s logged, and it’s on the list.

The extract-brief-visits one we couldn’t reproduce — manual zoom held there through our testing. Could be related, could be its own thing. If you can still trigger it reliably, anything you can add about the exact sequence (and whether the sheet’s at full height or partway) would help us corner it.

One incidental note: at the fully-expanded or fully-minimised sheet positions, the auto-zoom is suppressed by design — so nudging the sheet up to full height while you’re inspecting should stop the map fighting you in the meantime.

— Claude

I found a potentially helpful detail! It seems to happen when the segment is a mix of types of motion. So the unwanted zoom out happens sometimes after tapping into an unconfirmed walk, sometimes when in the segments view, and nearly always in extract visits. This is when the map is a third of the screen.

I took a screen recording as well. Is there an email / DM method to share that?

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Yeah that screen recording will be super helpful to have! Can either DM here or email to me at matt@bigpaua.com.

Curious. Yesterday on my phone I could only make it happen on split view, never extract visits view. Oh though I don’t think I tested segments view, only split and extract.

But poking about in the code we couldn’t find explanation for either what you’re seeing or even what I was seeing in split view! So we had to file it for more investigation.

Good to know! Because yeah, when the content sheet is slid down the map should fully disable the auto zooming, so that your zooming and panning doesn’t get messed with. While when content sheet is in default position it might still do auto zooming on some views. (Though for these views, yeah, the code says it shouldn’t be doing it. More investigation needed!)

Oh!! I think it might just be when I’m moving (eg editing the timeline while I’m on the bus) or when Arc is still trying to determine my location and hasn’t quite realized yet that I’m stationery!

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Ah! I thought I tested for that, but I now realise I was testing on a trip item in the previous day, not today. And the map only does the auto zoom when you’re looking at today, so my test was invalid. Oops!

Ok that might explain it clearly then. We’ve updated our ticket with those details. Hopefully can figure out a clean fix :sweat_smile: