[Pause at height Cura 4.3 = not working]

I've since updated my TFT to Bigtreetech TFT35 V3 as well as my board to a SKR 1.4 Turbo. Had some very smart people help me tweak Marlin and now I am pausing at height. It's all about the TFT screen

 

[Pause at height Cura 4.3 = not working]

Mmm...I'll try it again, I couldn't get either to work. I added a new printer profile, and now it stops for about 3 seconds, and resumes not giving me time to change filament. 

 

[Cura 4.3 Pause at Layer/Height not working on Artillery Sidewinder X1]

Apologies if this has been answered, I'm brand new to 3d printing and couldn't find this answer. I'm making a simple sign with raised lettering. I want to print the sign base in one colour, pause and change the filament to make the letters a different colour. I've tried the Extension/Modify G code, using both Pause at height using the Layer and height script options but the printer doesn't stop until the print is completely done. I've also tried the Filament Change script and the printer just prints the whole thing without stopping. I know I must be missing something simple. All the posts I've seen say Cura 4.3 solved the issues I've read about, including resuming 1mm resume gap but it doesn't seem to be working for me. I've also tried printing from a USB stick and a mini SD card.  I'm using a profile I downloaded which is producing beautiful prints for me, but I just can't get it to pause. Any step by step help would be very much appreciated. 

Thanks all,