This is usually a recipe for losing muscle when cutting. A legit, well-designed plan always matters, because your body always needs a reason to use/keep (or in an ideal situation, build) muscle when dropping fat.
You may not break PRs or add an inch to your lats, but simply screwing around with weights is barely, barely better than not lifting at all. Just winging it everyday in the gym is pointless, unless you're like the top 10% of experienced lifters who can honestly self-assess on the fly and basically improvise a workout set by set.
I'm confused. Two weeks ago, it was "I do like lifting heavy (well, heavy for me)". Are you still doing/did you ever start 5/3/1?