What does it mean when a guy doesn’t text you back until the day or time you have plans with him?

So I've been making plans with this guy this one day lets say its Sunday. Sunday we make plans to hang out Tuesday. So after we talk about the plans he doesn't call or text me until the day of the Tuesday.
I've made plans with this guy before and we would talk a lot even days before a plan.
Updates
+1 y
*day of the plans, Tuesday.
What does it mean when a guy doesn’t text you back until the day or time you have plans with him?
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