Roblox App Not Affected by Screen Time

Screen Time in general has proven to be very unreliable on my children's devices. The Roblox App seems to be the biggest offender as it routinely allows a bypass of Screen Time limits. All Apps are up to date, the iOS is up to date, and our devices are updated on schedule with new releases. This was the case at the time of original posting, and it still is. I have logged in and out of iCloud accounts and restarted devices multiple times, and on multiple days. I have also changed screen time limits and tried using multiple rules to get the same outcome (for example, a rule with a Roblox 1 hour limit as well as a rule for All Games limited to 1 hour). Regardless of the steps taken, my general observation is that nothing works beyond about 1 day. Because other rules seem to be dismissed as well, I'm starting to think the issue is at least partly with Screen Time. (YouTube.com and the YouTube App have a limit but they sometimes bypass the rules too). By far, however, Roblox is the most consistent offender as Screen Time seems to have almost zero control over this App.