Update for my issue, I took the iPad to the remote computer network and now it connects perfectly, asking for keyboard entry etc and connected, so actually my problem is to connect over the internet. Unsure if there is an extra layer of config required?
I’m having the same issue, but it looks like there was recognition of the problem and a fix in newer version. I only downloaded and installed within the last week. Jan 2020, so I’d be expecting to have the latest version. I’ve tried on a number of devices iPad iPhone Android phone Windows PC And android tablet. This was the first and it worked beautifully but I only have access to this device some of the time. after this I tried the devices I usually have.
It’s possible there may be other issues but what it looks like is no keyboard or the field is not expecting input.