Split features tool behaves unpredictably when split line is snapped on a segment

[qgib]

Author Name: Antoine Lafranchis (@alafr)
Original Redmine Issue: 21453
Affected QGIS version: 3.7(master)
Redmine category:digitising

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The split features tool sometimes splits and sometimes doesn't split the feature, when the split line's last vertex is snapped exactly on a segment it. I attach a screencast to illustrate the issue because it's not totally reproductible. The issue is the same whether the feature is selected or not. It happens both with polygons and linestring geometries. It's probably due to small floating-point calculation inaccuracies.
In the examples shown in the screencasts, the CRS of the project and the layers (temporary memory layers) was the same (EPSG:3945).

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• split_features.gif (Antoine Lafranchis)
• split_features2.gif (Antoine Lafranchis)

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• category_id was changed from Map Tools to Digitising

[Pedro-Murteira]

I can still replicate this issue on QGIS 3.16.14 and 3.22.1.

[MTrim]

In a project, I encountered this bug. It seems it hasn't been resolved yet. Is there a workaround or an approach to this? I also have resources to sponsor a fix.