12 Fs across 34 students is not statistically significant. Comparing the spring 2022 vs spring 2026 rates only works if the composition of the groups is similar (e.g. same % of students that previously failed the course), which seems dubious given the dramatically different sample sizes.

That doesn't mean there isn't a problem worth investigating. If I was a dean I'd certainly have some questions if I found out that 35% of students failed a class. But without knowing the specifics it's irresponsible to draw any conclusions about these 34 students with the limited data we have available.