Set the FAULTMASK bit and then execute a command that triggers a HardFault

[cnc_designer]

I set the Faultmask bit to 1 with the following code snippet and then write 0x5A to an area outside of RAM and read it back.

Since the Faultmask is set to 1, a HardFault does not occur, but the command line I have highlighted is also not being executed.

The processor is not responding at all; I am executing these commands step by step in the debug menu or I want to pause the processor by setting a breakpoint

What could be the cause of the problem? What state might the processor have entered?

MOV R0, #1
MSR FAULTMASK, R0

LDR R0, =0x20002800  ;  The address 0x20002800 is outside the RAM area.  
MOV R1, #0x5A
STRB R1, [R0]
LDRB R1, [R0] ; !!! PRODUCE HARD FAULT !!! But FAULTMASK BIT=1

MOV R0, #0
MSR FAULTMASK, R0

[cnc_designer]

In this line, the processor enters a loop: LDRB R1, [R0]; !!! PRODUCE HARD FAULT !!! But FAULTMASK BIT=1

I want the next command following this instruction to be executed.

[Tesla DeLorean]

Perhaps you can increment the PC in the stacked context and return from the Hard Fault?

[cnc_designer]

I need to know whether the instruction is 16-bit or 32-bit. In this example, I can determine how many bits the instruction has, but I don't like this solution. I need a general solution