Can confirm the . thing happens to me also half.of.my.google.searches.are.like.this so I have even learned to be cautious that the last word does not look like a tld :)
Also, I used a couple alternative keyboards a few years back, but I have found that some point some iOS update within the last few years made the stock keyboard the best for me. When I type on the gBoard on my wife's phone it might as well be dvorak, everything comes out gibberish.