Yes; especially when it’s many of them. I used to find myself thinking I am going to learn all the Kanji, complete WaniKani, and do everything in a year, but in reality, you should go at your pace and make sure you learn everything thoroughly. If you make it too much of a habit, what can happen is that it comes back later (like an SRS system does) and you will likely still not know it and be tempted to do it again, making your feel guilty each time. If anything, self study (whether it’s with the script, the Benkyou App, or yourself looking over it). They will have to stick one day.
I feel your pain where I feel like I need to cheat sometimes with the main Kanjis and Radicals, but I only do it when I know it’ll be an instance where I’m stuck right at like 87% Kanji. xD
In general, go with what your heart says. For me, even when I fail enlightened to burned items (which take ~4 months to come) that I truly forgot, I tell myself it’ll be better in the end if I get it wrong, strongly re-enforce it my head, and truly burn it. They say Levels 1-3 is building blocks, but they do use more Kanjis as building blocks and sometimes utilize previous vocabulary in future lessons. And in the end, you may be proud (likely will be) if you hit Level 60, but what you carry that’ll make you really proud is what you’ve learned and how use it.
This is irrelevant, but today is my anniversary since I started WaniKani (not being in the community, but finding and doing WaniKani on 10/30/2018). 
I’m still happy here and I wish all of you the best of luck (and beyond WaniKani too).
Oh, and make sure to always do your WaniKani. lol