Mobile: clicking pages menu dropdown closes the side menu

[fxpar]

Hi,
(hope it is the place to post, very new on github)

bolt-theme-spatial version 2.0

Action
On mobile phone, I open the menu, and click on "pages" to unfold the list of subpages.

Unexpected effect
The side menu closes before I have time to click on one of the subpages.

Not working solution
I erased the "path" line for the Pages Label in Configuration > menu set up.

I have noticed that the original template from templated.co didn't have the "folding / unfolding" drop down for sub pages. Maybe you have an idea where to make the modifications to stop this to happen.

Thank you for your help.

François