Not really sure if that is only happening to the Persino mod, but it doesn't seem to appear in any other mod (like I would play any other mods).
Sometimes, When I win a battle and go the the lootscreen, the game freezes for a moment, than turns black (monitor turned off) and a HDMI icon appears for a few seconds in the upper left corner. After that, the game returns but the game goes extremly slowly. If I press a button, it takes at least 5 seconds for the game to react. Even after leaving the menu I can't play the game properly and have to forcefully close the game.
I took a break from the mod for like 3 months and this never happened before.