Starlight Mini (Local) Changes Aspect Ratio?

I am running Topaz Video 1.0.1. I am using Starlight Mini locally on my pc to process older videos with 4:3 aspect ratio. I de-interlace first, then run locally using the Starlight option. The output looks terrific, but for about half the videos the aspect ratio is very slightly changed. Specifically, the output is slightly wider, which distorts (stretches) the content in comparison to the original. My understanding is that the original aspect ratio was designed to be preserved in Starlight mini. Interestingly, on occasion, using Starlight Sharp preserves the aspect ratio, but usually not. Since running Starlight Mini locally on my pc does not allow tinkering with any specific settings, I guess I am wondering what might explain this issue of changing aspect ratios?

6 posts were merged into an existing topic: [KNOWN ISSUE] Error when processing input videos with non-square pixels