Help! Dylos not rendering correctly

Help please! Dylos on one machine is not rendering correctly. It looks like the graphics were created on a BBC Micro. Version of Onyx is old one 4.4.1186.0 and display adaptor is Intel UHD 770. I have never come across this bug and any help much appreciated!

Your own or factory content?

Factory content. Issue has been resolved by updating graphics card driver. Thanks Matthias.