PSD changing corner radius of triangles when exporting.

When using 'Export as...'  triangle shapes have their border radius changed after exporting. The preview shows the correct image, but when exporting the triangle has completely changed it's shape. 

I've found another post of 2020 stating the same bug issue, is there any way to fix this yet? 
So far the only way to fix it, is changing the triangle shape to a rasterized layer, which isn't the ideal situation.

Here I changed the shape of 'Schouder' to a rasterized layer.

Here I changes the shapes to smart objects, no luck in the export. This is the design as shown in PSD and in the preview.