Lines of a trace/shape and points disappear while deleting them fast if there are more than 80 points

[dbemke]

ODK Collect version

store version 2026.1.1, the master version d06379a

Android version

10, 16,

Device used

Redmi 9T, Pixel 7a

Problem description

The lines of a trace/shape and points disappear (for a moment) while deleting them fast if there are more than ~80 points added.
The issue occurs in Mapbox. In Google Maps it seems more like flickering. In OSM it seems to be ok.
In the video below first I tap slowly and later quickly.

XRecorder_05032026_124627.mp4

Steps to reproduce the problem

1. Set Mapbox as a source of maps.
2. Open All question types form.
3. In a geotrace or a geoshape add 80 points or more.
4. Start deleting points, try to tap really quickly.

Expected behavior

I'm not sure - should tapping the delete button fast be allowed or the lines and points shouldn't disappear even if someone deletes points very quickly.

[seadowg]

@alyblenkin we could do some optimization to avoid this, but I'm thinking it's OK to hold off on right now until we've cut down the number of map engines. Let me know if you disagree!

[alyblenkin]

Agreed @seadowg!