Old iOS (9.3.5) Unable to access HA

Hello,
I have an old iPad running iOS 9.3.5 (the most current it will run) that I had intended to use as a wall-mounted dashboard/kiosk; however, a quirk with password entry has me stymied. Assume the password is “password”. When I type the password alternate characters are skipped e.g. “pswr” or “asod”. This occurs with Safari, Dolphin, and Chrome. It also occurs with Kiosk and Kiosk Pro Lite. I reset the iPad to factory settings with identical results. I’ve tried entering the password via “paste” and with various other minor tricks to no avail. Nabu Casa will not install on iOS 9.3.5. Any thoughts would be appreciated. Thank you.