Same here, seems like the same old bug in this thread
https://granado-espada.to/index.php?threads/bug-bounty-hunt-program.349/ . After the patch it got WAY worse though. I would usually crash a couple of times a day (if playing almost all day), mostly on Reboldoeux and Armonia. Waiting a bit usually allowed me to get back in those cities anyway.
Since the patch I have crashed in pretty much every city (have not tried Errac and only got as far as Armonia) except Castilla and Kielce. Even at Gigante I crashed. In the bounty hunter hall too, which was new. They are completely off-limits. The problem SEEMS to come when you get close to the market zones and central hubs of city, where a lot of players are. Warping to Panfilo for a quest did not crash the game for example, but when i got to the plaza the game crashed.
Though I also cannot get into Ustiur (which is my saved starting warp, so i cannot play at all) which is usually the least populated. This is also weird because I have been able to get into Ustiur since the patch, but i have been unable to enter it for the last 10 hours or so without reliably, instantly crashing.
I have tweaked all the options i could (beside the ingame ones, since i am stuck at my barracks for the time being) and downloaded the game again but with no results btw.