How to lock out <note> in XLF

Hello,

 

We have <note> in one of our customers' XLF file. they're not included in the "source" / "target" segments, still Studio shows them as translatable units.

See my screenshots below:

 

I tried to customize the settings but in vain:

 

These segments are still visible in the Editor.

 

Can someone help me in how to lock them out ?

 

Thank you

 

Regards,

Géraldine