Periscopes go down by themselves

I'm very new here, barely 10 hours into the game. I've encountered an issue, where no matter what, the periscopes don't want to go up. As soon as I press the keybind or on screen button to raise it, it immediately starts to go down by itself.
Am I missing some sort of mechanic here? Is this supposed to happen for some reason?
I haven't found any information about this anywhere.