I face some weird problem. After buying some secrets in Lucilia forest they appear on map, but won't last long - after first loading they disappear. Any way to fix it?
The treasures are always there, you don't need to buy the secrets to unlock them. The better way is actually buying the secrets, knowing where they are, then load. That saves you money.
I find the map often glitches on markers disappearing. (Homestead is particularly obnoxious if you want to see all your portals open.) In general, it seems (at least for me) like if you just re-load the game while on the map you want to see the markings for, they are restored.
If all of the secrets are on the same map, then a workaround (of course not ideal) would be to mark the secrets manually on your map, hopefully the player created markers don't disappear for you.