Rough start 2015/52K

I've seen several posts on here about rough starts in older model years but I have a 2015 Prius III with 52K miles that we purchased certified pre-owned about a year ago. This morning and maybe two other times over the few weeks, I've experienced rough starts for a few seconds after the gas engine kicks in. They've always been on cold starts, but not at super low temperatures and not when it's humid or raining. I've still got about 3K left on this oil change and the last maintenance check was in November. I'm going to try some injector cleaner just as a first line option, and it would be great to get your thoughts on possible problems before I take it in for evaluation and possible service. Thanks in advance.

 

No, it's been when I'm heading to work in the morning. Usually a 20-30 minute drive.

 

Unfortunately it's out of the original warranty and we didn't opt for the extended because a lot of threads on here advised against it. Do you think it's a possibility I can argue that something like this shouldn't be happening if it was CPO or what do you suggest?

 

I asked my husband and he did move it to another parking spots once or twice on recent nights. I'm not 100 percent sure it was the nights before it happened, but do you think this could be the reason?