Question about why angr doesn't identify functions properly

[goldds96]

Question

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Descriptions

The decompiled code of the sub_467c98 function of the given httpd binary is shown in the photo below.

However, looking at the disassembled code(mips32) in the photo below, it correctly identifies that the nvram_get function is called in part 1 (nvram_get("wan_proto") in the decompiled code).

However, part 2 (nvram_get("l2tp_server_ip") in the decompiled code) is marked as UnresolvableCallTarget, not nvram_get.

The instructions performed on the t9 register used to call the function are the same, so I am curious as to what causes the called function to not be properly identified.