Grouping elements bug when have LPE and svg:polylines inside

How do you think Inkscape could be improved?

Steps to reproduce:

• Export a score sheet page from MuseScore to SVG
• Open it in inkscape (all right till now)
• Select all elements
• Group selected elements, then appears strange elements deformed and many others are changed!!

What happened?

Appears extrange elements ...

What should have happened?

Maintain objects like before grouping them ...

Inkscape Version and Operating System:

• Inkscape Version: 0.92
• Operating System: OpenSUSE
• Operating System version: 15