Tagged arrays not being initialized correctly with `...` syntax

Compiler version: Pawn compiler 3.10.11 downloaded from open.mp v1.4.0.2779 server build

When initializing an array using a tagged enum size with the ellipsis (...) syntax, the array is not being properly initialized. Specifically, elements after the first one are set to 0 instead of being repeated as expected.

MVCE:

enum e_TEST_ENUM {
	TEST_ITEM_1,
	TEST_ITEM_2,
	TEST_ITEM_3,
	TEST_ITEM_4
};

new NotWorking[e_TEST_ENUM] = { 5, ... };

const TEST_ENUM_SIZE = _:e_TEST_ENUM;
new Working[e_TEST_ENUM:TEST_ENUM_SIZE] = { 5, ... };

#assert sizeof NotWorking == sizeof Working

main() {
	for(new i = 0; i != sizeof NotWorking; ++ i) {
		printf("%d, %d", NotWorking[e_TEST_ENUM:i], Working[e_TEST_ENUM:i]);
	}
}

Output:

5, 5  
0, 5  
0, 5  
0, 5  

Expected behavior:

5, 5  
5, 5  
5, 5  
5, 5  

Start by reproducing the MVCE with Pawn compiler 3.10.11 and compare the tagged enum-size initialization with the integer-size form. Trace the compiler's handling of { 5, ... } for both declarations; done when the tagged form repeats 5 for every element and matches the expected output.