How to prevent OPNsense from sending RA's with lifetime 0?

[Cristian_Ichim]

@meyergru It appears to me that this has something to do with the time that goes between the RA 0 and the first RA > 0. If that time is less than a certain amount (I think three seconds), then the Android device willfully ignores the router afterwards. If the time between these two RA's is greater than three seconds then Android does not ignore it anymore and thigs go fine. At least it looks like this after running some tests.