Why STM32WB5MM-DK OLED Display stops P2pClient code working

[CMcD12]

Hi,

I have a project where im using the STM32WB5MM-DK to develop code to act as a ble P2P client.

I have the development board setup as a P2P client and the code is working fine. but when introducing the code to initialize the onboard OLED screen my Bluetooth scanning seems to not function anymore.

Am I missing something with interrupts or Systicks?

Any help would be much appreciated,

Thanks,

Chris