Issues masks on components

I am working on an icon font with lots of reusing of shapes and want to take advantage of components and corner components strokes and masks as much as possible without decomposing any of it.

Here is an example of me using a mask on a component

when exported the result has issues with where there used to be corners components.


If I decompose the component the result looks as expected:

Can you send me the file?

sure, check email

can you try the latest cutting edge version?