It would be even more interesting to know if the problem was a one-time occurrence or if it keeps coming back. Of course, it is just as possible that Roobet was under very high load at the time and all those who wanted to reconnect to the site (or play games) encountered problems.
Roobet has certainly set up a corresponding monitoring to detect such problems and to be able to fix them quickly. From the user base alone, Roobet is absolutely not a small platform anymore.
I could say that it could be one time thing or a long term problem at the same time as well. How? Well it could be something you are doing that impacts it, like just to give a very very simple example, you might be downloading a movie or anything and that might be eating up all your speed which would result with you having slower internet connection going into roobet, I can't count how many times I had very slow connection and later realized it was because I was downloading assets for a project.
This is just one example, it could also very well be VPN related, if you open up the VPN on opera browser and go to roobet it is almost always very very slow, and it is not slow on google, instagram, facebook, reddit, twitter none of those are slow with opera vpn, but roobet is slow with it, so you may forget about it and think it is roobet that has a problem. This means it is both a onetime problem if you do not have that anymore, or could be long term if you keep doing that.