you are learning 損失 wrong and it shows

Step one, you buy the standard textbook. Step two, you write the kanji fifty times. That is the only way to not fail. But I keep seeing lazy people mix up 損失 with other vocab because they skipped the basics. If you actually master the foundation, 損失 is simple. Stop trying to find some anime mnemonic shortcut and just do the rigid daily trace method. Your memory leaks are your own fault.