I bought the game in July 2019 and my wife and I have played consistently since. I've completed researching most items, opened gates on all but Glacio. We started noticing this on Glacio when going to the center. Getting in and out of the Medium Rover caused a crash and we lost progress from last save. This initially happened only a couple times in several days playing. Now, as we have progressed in the game, its happening more frequently. I'm lucky to get to save once in four attempts.
I assumed this was either save file size or save file file corruption. I have since reinstalled the game, renamed my save files (hoping files were rewritten), hard rebooted the console, cleaned out old games to make sure we have at least 30G space. Nothing so far has helped. In fact, right after reinstall, I couldn't initial load the game (crashed).