(PHP) Undefined Index from existing keys in getMulti result

Array
(
    [testKey] => testVal testKey
    [testKey1] => testVal testKey1
)


result key: testKey ; result value: testVal testKey
string(7) "testKey"
multiResult[testKey]: NULL

result key: testKey1 ; result value: testVal testKey1
string(8) "testKey1"
multiResult[testKey1]: NULL



------

query key: testKey
string(7) "testKey"
NULL
query key: testKey1
string(8) "testKey1"
NULL