Inkscape 1.1.0 alpha "Pattern Along Path" is wrong
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#### Steps to reproduce:
<!-- Describe what you did (step-by-step) so we can reproduce: -->
- open Inkscape
- press E create arc,shift + ctrl +C convert it to path
- press CTRL + D remake another arc
- Shrink the new arc and drag it to another position
- Select two arc and align them horizontally
- menu > extensions > generrate from path > interpolate
- generates a gradually smaller arc array
- SHIFT + CTRL +G break up array groups and SHIFT + CTRL + C convert them into paths
- select array and CTRL + + merge them into one path
- select E create a big arc
- shift + ctrl + C convert it to path
- select big arc and array
- menu > extensions > generrate from path > Pattern Alone Path
#### What happened?
...it is wrong,as shown in the uploaded file, but I used "menu > path > path effect.. > Pattern Alone Path" to do the same thing to show the correct result.
#### What should have happened?
...it show the correct result
#### Inkscape Version and Operating System:
- Inkscape 1.1-alpha (inkscape@09317075e1f44acc73d8c3b308d28b6757d7da8f, 2021-02-08) appimage
- Operating System: manjaro gnome
- Operating System version: 20.2.1

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