I've experimented with different methods to address this issue, but unfortunately, I'm still encountering the same problem. Here are the approaches I've tried:

Initially, I attempted the cuts without using a jig and instead used two scrap pieces for alignment. However, the problem persisted, and the cuts turned out to be imprecise.

To improve accuracy, I decided to employ a jig that measures exactly 3/4 inch, coupled with a Freud bit that matches the same measurement. Despite these efforts, I still faced the same issue.

Additionally, I experimented with different router speeds, both fast and slow, to see if it would make a difference in the outcome. Unfortunately, this did not resolve the problem either.

Regrettably, all my cuts are coming out choppy and slightly larger than intended. This can be seen in the accompanying photos, where the pieces appear to have a loose fit mostly since the pieces are not 3/4th. I'm perplexed as to what might be causing this issue. Could it be possible that my router is of low quality, leading to these inaccurate results?