grid does not disappear in some areas

[MakiWolf]

How to Reproduce

Happens in this area: https://www.openstreetmap.org/#map=17/46.43707/11.25036

Expected Behavior

Grid should disappear

Versions affected

53.2 from play store and latest build from source code (12.07.23)

[mnalis]

• I've seen that too; related: Area shown as downloaded on map, but no data on device #5068 (comment)

[westnordost]

If you tab out and then tab in again, is the grid gone, then?

[MakiWolf]

I have made a screen recording now.
I did not notice this strange behavior in an other map area on the same device.
video:
https://github.com/streetcomplete/StreetComplete/assets/73300633/5762bc15-8356-4a61-ad03-aecf7ae60b24

[westnordost]

Okay, but would you answer my question?

[mnalis]

If you tab out and then tab in again, is the grid gone, then?

By "tab out/tab in" you mean switch to another app and then switch back to StreetComplete?

[westnordost]

Yes.

[MakiWolf]

Also happens when switching to another app or closing and reopening the app and also in an fresh install on Android Studio Emulator (tested with Pixel 4 API 29). Also happens on other cities like in Zirl (Austria) on the same longitude. https://www.openstreetmap.org/#map=19/47.26540/11.25033

[HolgerJeromin]

I had this too when the feature was new.
Manually "search for quest here" fixed it.

[Helium314]

@MakiWolf interestingly when I downloaded this area, I initially got the bug on the right half of the displayed area. After turning the screen off and on again, it was the left half (also after restarting SC).

[riQQ]

Had the same issue with v53.3 in two different areas, after turning the screen off and back on with StreetComplete in the foreground the grid went away / it fixed itself both times.

I have the following reproducible behavior after somehow triggering the bug the first time.
Have two areas downloaded with changes in each.

1. Open App and see grid
2. Turn off the screen and turn it back on
3. Grid is gone
4. Move to change in other area via undo function (don't undo anything)
5. Grid is there
6. Go to step 2

[westnordost]

This is very likely a problem in tangram-es, though, and hence, unfixable, since the former is not maintained anymore.

What we can do is to mitigate the issue. I had the impression that it more often occurs on lower zoom levels, so actually the grid is only turned on when zoomed in further already.

[MakiWolf]

This is very likely a problem in tangram-es, though, and hence, unfixable, since the former is not maintained anymore.

@westnordost Maybe streetcomplete should make a fork of it, if it is really not maintained anymore? That open Pullrequests could be merged. Because issues will become more on never android versions. Is this the repositority? https://github.com/tangrams/tangram-es

[westnordost]

Well, someone could make a fork of it. I certainly won't because I am not experienced in C++ and thus couldn't properly review those PRs.