Screen on, can’t hear. Screen off, can hear.

I had my screen replaced recently. I just noticed that, when making or receiving phone calls, I can’t hear if the screen is lit up.

I dial, phone goes black, but I can hear. But if I touch the screen and it lights up, the volume cuts out completely.

Also, I can’t put calls on speaker and the ringer doesn’t ring. Vibrate does work.

Thanks for any help.