(Hi guys, congratulations on your Series A, makes me even more confident in building my businesses on your platform, and Zeb thanks for reading all our suggestions.)
ClickUp has "trained" me that everything is always saved by using the X to mean "close this box and don't worry your changes are already saved." However there are a few places that you must click a save button or you lose your work, and I've been so well trained from the other UX that I don't notice the save button, and I click the X and then lose my work. An example is Edit List Statuses.
Please scrub the UX for non-real-time change interactions and add "You are leaving without saving your changes, are you sure?" type warnings.
Thanks for your consideration!