$fscanf and $fget do not work when any portion of Verilog-A file is encrypted

$fscanf and $fget appear to return empty strings if any portion of the Verilog-A file is encrypted, but work fine if the encrypted portion is removed.

This Verilog-A code reads in data from an external file and prints some information to the spectre log. The file example.txt contains the phrase "You should see this".

// VerilogA for VerilogA_Bug_Example, ReadFile, veriloga

`include "constants.vams"
`include "disciplines.vams"

module ReadFile;

parameter string file_location="/home/USER/example.txt";
integer myChanDesc;
string temp;

// pragma protect
// pragma protect begin
    analog function real doNothing;
        input x;
        real x;

        begin
            doNothing = x;
        end 
    endfunction
// pragma protect end

analog begin

    @(initial_step) begin
        $strobe("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
        $strobe("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
        $strobe("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
        myChanDesc = $fopen(file_location, "r");
        $strobe("Channel Descriptor: %d", myChanDesc); 
        $strobe("Path: %s", $cds_get_resolved_path( myChanDesc )); 
        $fgets(temp, myChanDesc);
        $strobe("First Line: %s", temp); 
        $strobe("Non-zero if end-of-line: %d", $feof(myChanDesc));
        $strobe("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
        $strobe("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
        $strobe("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
    end

end

endmodule

The above code correctly returns the following when run in a transient simulation by Spectre APS:

Channel Descriptor: 2
Path: /home/jensenct/txt.txt
First Line: You should see this

Non-zero if end-of-line: 0

After running the below command to encrypt the "doNothing" function the below code is produced. (Note the encrypted blob was removed for security reasons).

/apps/cadence/SPECTRE231/tools.lnx86/bin/64bit/xmprotect -language vlog verilog.va

// VerilogA for VerilogA_Bug_Example, ReadFile, veriloga

`include "constants.vams"
`include "disciplines.vams"

module ReadFile;

parameter string file_location="/home/USER/example.txt";
integer myChanDesc;
string temp;

//pragma protect begin_protected
//pragma protect encrypt_agent="NCPROTECT"
//pragma protect encrypt_agent_info="Encrypted using API"
//pragma protect key_keyowner=Cadence Design Systems.
//pragma protect key_keyname=prv(CDS_RSA_KEY_VER_2)
//pragma protect key_method=RSA
//pragma protect key_block
removed for security
//pragma protect end_key_block
//pragma protect digest_block
removed for security
//pragma protect end_digest_block
//pragma protect data_block
removed for security
//pragma protect end_data_block
//pragma protect digest_block
removed for security
//pragma protect end_digest_block
//pragma protect end_protected

analog begin

    @(initial_step) begin
        $strobe("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
        $strobe("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
        $strobe("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
        myChanDesc = $fopen(file_location, "r");
        $strobe("Channel Descriptor: %d", myChanDesc); 
        $strobe("Path: %s", $cds_get_resolved_path( myChanDesc )); 
        $fgets(temp, myChanDesc);
        $strobe("First Line: %s", temp); 
        $strobe("Non-zero if end-of-line: %d", $feof(myChanDesc));
        $strobe("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
        $strobe("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
        $strobe("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
    end

end

endmodule

Which incorrectly returns the following when run using the same test bench:

Channel Descriptor: 2
Path: /home/USER/example.txt
First Line: 
Non-zero if end-of-line: 0

Running $ftell after trying to read several lines still returns 0. This issue also appears to impact $fscanf.