Drop box for My Mumsnet not working

[SPsCliffingAllOverMN]

I'm on my mobile and tried to change my name. To do so I have to change to desktop site. The drop down box drops and goes back up straight away so I cant click on anything. It does that if I hold it down. If I just click it does nothing

[HelenMumsnet]

Oh dear. Is this still happening?

We can't replicate it this end...