First of all, you need to determine if that’s a problem with Internet connection overall, or related to parental control in particular. It would be helpful if you have a profile with parental control turned off. If you switch to that profile and the problem goes away, then the problem was caused by parental control.
It it’s a general connection problem, then you may try rebooting the router.
If it’s a problem caused by parental control, then it might be related to your switching the computer between profiles.
Please let us know which is the case and we’ll go from there. Thanks!