Split geometry tool failing with different coordinate systems

[erpas]

As reported by a user:

I had some issues with the splitting function and found out, that it occurs when working with different coordinate systems in multiple layers.

For example: I have prepared the following layers:

a polyline in EPSG:31255 a pointlayer A in EPSG:31255 a pointlayer B in EPSG:4326

• When opening the project I can split the line without any problems
• then I record a point in the layer B (4326)
• after that I cannot split the line (31255):
• then I record a point in the layer A (31255)
• after that the splitting is possible again

Somehow the switching between the CRS affects the layer identification. I’ve shared the project with „support“ and here is a short video: https://www.loom.com/share/2eb9aab7762e415aa76a872b961ba6a4

[Tadeo98]

Indeed, if previously edited/added feature is from layer whose CRS is different than the one of layer with feature on which the split is done, the split fails with error. The only exception is that it is working if previous feature is from layer with undefined CRS. Normally this issue does not occur if the CRS of layers are the same.