Can't enter custom tag and can't clear individual selections with the remove buttons (X) on mobile

I tried the select on mobile (mostly on the codepen) and there are some issues, at least on my device (Android 9, Chrome 76):

On a tagging enabled field, I am not able to enter a custom tag. As soon as I touch the field, the tag choices appear (native mobile UI). What I would like to do is be able to put the focus in the input box (having the placeholder "Enter a tag...") and enter a custom tag.
On a multiple/tagging field, I am not able to remove individual selections by touching/clicking the X at the item level.

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