this seems like it’s some variant of the problem previously reported as: https://forum.inaturalist.org/t/verifiable-false-in-url-strange-behaviour/9682
the keys to reproducing are that (1) you need to keep the Filters menu open (don’t click Update) when (2) you click on Your Observations. (here, you’re not clicking the Your Observations check box in the Filters menu. you’re clicking the Your Observations link the the main menu, which will take you to an Explore page that’s preset with just your observations.)