I recently started playing Vampyr on PS4 (Oct. 2020), and I'm noticing frequent game crashes when trying to place a custom marker on the map. This issue occurs when trying to place a custom marker on top of a side mission marker. I have had no issues placing custom markers elsewhere on the map. The game crashes to a blue error screen. I'm using the digital version of the game. Since the game is a couple years old, I doubt we will see an update to fix this problem, but knowing is half the battle. I recommend you avoid the above-mentioned scenario unless you're trying to follow the scientific method of discovery in order to determine if this, too, is the cause for your game crashing.
Vampyr consistent crashes on map screen (PS4 Pro)