So, I'm the host of a popular server for RP.
Seeing as it's an RP server, alarms are used quite frequently.
However, I have noticed that whenever I, the host, hit the alarm buttons, or the light switches, those interactions are only present on my client, and not for the rest of the server.
Meaning that if I turn on or off the alarm, or lights, only I can see that change.
Is this a bug with my game, or is it a more well-known issue? Is there any way to fix it?

never heard of that, try reinstalling the game

Well, it's been present the entire time I've had BT, from when I started hosting a few months ago, to now. I've reinstalled a couple times during that period I believe.