Screen goes blank when click on textfield with okboard installed

REPRODUCIBILITY (% or how often): 100%
BUILD ID: 3.4.
HARDWARE (Jolla1, Tablet, XA2,…): xperia 10
UI LANGUAGE: english
REGRESSION: (compared to previous public release: Yes, No, ?): Yes, new

DESCRIPTION:

can not type in wifi password as screen is black

PRECONDITIONS:

have okboard installed

STEPS TO REPRODUCE:

  1. turn on wifi
  2. phone will show some networks (password forgotten btw)
  3. click on one network
  4. screen goes black, only keyboard is visible

WOW: actually it does happen on any textfield. just tried to login into password manager and screen went black on click on textfield.
yes, reason is okbard, did update title …

EXPECTED RESULT:

i can see the view and type in password

ACTUAL RESULT:

only keyboard is visible no textfield …

ADDITIONAL INFORMATION:

the ui goes black actually when textfield gets the focus.
with a little edgeswiping etc you can see the wifi credentials ui, but as soon as you click on the password field ui is gone

(Please ALWAYS attach relevant data such as logs, screenshots, etc…)
in fact it is not white, but black…

I can confirm this for my Xperia 10 plus. This concerns SFOS Apps and Android Apps