Can one set custom static ips from mobile luci?

Hi, I'm trying to set a static lease from a mobile device using luci. However, when I type in the IP I want to set in the form, there is apparently no way to confirm it or I cannot find it. If I click out of the drop-down list again, it selects the previous entry, not the custom one I typed in. This is also the case when I set chrome to desktop mode on my android phone.

I already had this problem on openwrt 23, it's the same on 24.

Is there some other way to set custom static ips from a mobile device or do I always need a pc?

Thanks in advance!