Are you aware of this Unofficial build? [UNOFFICIAL BUILD] e-0.18-r (Red_velvet_cake/android_11_based) for Galaxy s4mini LTE (serranoltexx) GT-I9195
I notice that the dialer is mentioned as an issue for the Unofficial build, as a troubleshooting method you might see is Simple Dialer from https://www.simplemobiletools.com/ makes a difference to the Contacts issue.