Blendspace2D BLEND_MODE_DISCRETE_CARRY doesn't carry and resets for each animation

[archead]

Tested versions

• Reproducible in v4.2.1.stable.official [b09f793]
• Was fixed in Fix issues with BlendSpace2D BLEND_MODE_DISCRETE_CARRY #48375

System information

• Windows 10 v4.2.1.stable.official [b09f793] Forward+ and Mobile

Issue description

All the hard work for documenting this issue has already been done in #41028
and but unfortunately seems to have regressed.

Steps to reproduce

Please see the project provided below.

Minimal reproduction project (MRP)

Please see DiscreteCarryBug.zip from #41028

NOTE: you might have connect the nodes from "Start" to "idle" in AnimationTree after you port the project to latest Godot version!

[archead]

After some further testing, this seems to only occur when the animations are set to Looping, one-shot's carry work.