From one person's experience (mine): They don't read CVs that closely. I've got a couple of 1 year jobs (not contracts) and they're more interested in what I did rather than why so short. If they ask I tell them it's because I didn't like the position but gave it a go for a year. I also have a 2 year gap in employment none of them are interested in for 4 jobs now, they don't even spot the missing years and I've had to point it out in interviews because it's a story of how I deal with big tasks.

If they are that petty that they'll pass me over because of something like that then that employers policies would raise more flags than I'd want to deal with anyway.

When hiring you have hundreds of CVs pass by, I'm looking for experience, we'll sort out these other details in the interview.

Caveat: I am older now, more senior but never had issues finding work.