Yeah, unfortunately there’s no indication as to what causes them and for how long they are.
Usually when asking Support about a restriction, they’ll give you the exact duration. Try resubmitting and explicity ask for the duration/time remaining.
As for the type of restriction, different actions have different restrictions. The only two that I know about for sure are VPN use and business IP use. Both of those are IP restrictions so using a different IP will allow players to connect. (Here’s a list of the prohibited behaviors.)
Something to watch out for with VPNs/business IPs is, during a restriction, don’t accidently try to connect while using those. It will reset the timer back to the full 14 days.