Emulator = FUSE 1.9.0 (selected machine = ZX Spectrum 128). Version with graphics. 
Would you be able to do me a favour and try a different emulator, such as this online one: https://jsspeccy.zxdemo.org/? I don't have Fuse set up with the 128K ROMs, but it works fine on Speculator. Also the 128K Spectrum emulator on ZX Spectrum Next.