I have recently been accepted as a Probie in the firestone state patrol. I didn’t get any messages when I joined, the only thing that let me know is when I went on my group page. Now, i have had a similar incident before this too. I ended up being fired from POST as a JI because they didn’t send me a message and I had no idea I was accepted until it was too late.
I got a message when I was accepted into FSP (about 6 months ago) and I’ve always had a notice each time I get accepted into a department. I believe this is a one time incident or you have a strange Discord name that makes it hard to contact you.
I’ve applied and been accepted to: SCFD, SCSO, DHS, DOC, FNG, and DOT. Everytime I got a Roblox or Discord (sometimes both) letter. Human error is possible though.