Many people report this, but it’s most likely simply be a matter of what you’re used to. If you read old widely spaced texts for a few months I suspect the issue would disappear completely.

Having said that, I’ve looked at this issue long enough to expect that there may be something hard-wired in a minority of people that may make them respond particularly poorly or particularly well to wider sentence spacing. This is why the ultimate solution that I advocate is that computers should provide adjustable sentence spacing. But here is the irony: the very issue of sentence boundary disambiguation means that computers will get sentence boundaries wrong part of the time unless we mark them, and the easiest way to mark them based on existing behavior is to use two spaces between sentences.

If you want to adjust sentence spacing, you should advocate for two spaces between sentences.