ID 393864 - Vector painting in world space does not create smooth transitions between UVs

Problem summary

Vector painting in world space does not create smooth transitions between UVs

Customer reported version

4.5v1

Customer reported platform

Steps to reproduce

1) Open Mari and the New Project dialogue 

2) Select the attached geometry and under Channels select only the Vector channel preset 

3) Add a new layer to the Vector Channel and using the Vector Paint tool (mode set to Paint Flow Vectors) to paint some strokes

4) Add an Adjustment Tangent to World layer on top 

result: There is no smooth transition of the strokes between UV cuts 

Expected behaviour
The strokes should transition smoothly between UV cuts

Actual behaviour
There is no smooth transition of the strokes between UV cuts 

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Workaround
Unknown

Reproduced by support
This bug has been reproduced in:

4.5v1 - Windows 10

4.2v1 - Windows 10 

3.4v1 - Windows 10 - CentOS 7 - OSX 10.12.6 - regression

Unable to reproduce bug in:
3.3v1 - Windows 10 - CentOS 7 - OSX 10.12.6

Earliest version tested
3.3v1 - This issue no longer appears in this version and has regressed