yea the problem is when you beacon tank2 by the pally healer you are in tank2 group and heal them.
But you are in tank1's group and healing tank1 and group1 but your beacon is on tank2 in group2.
When I tried to beacon tank2 it tried to heal group2. When I tried again it went back to tank1 group1 and would not beacon tank2.
WEIRD
I hope I described that correctly.
group1...........group2
tank1.............tank2
pallyheal1........pallyheal2
so pallyheal1 must beacon tank2 BUT heal group1
it looks to me that pallyheal1 puts beacon on tank2 it tries to heal only group2
But you are in tank1's group and healing tank1 and group1 but your beacon is on tank2 in group2.
When I tried to beacon tank2 it tried to heal group2. When I tried again it went back to tank1 group1 and would not beacon tank2.
WEIRD
I hope I described that correctly.
group1...........group2
tank1.............tank2
pallyheal1........pallyheal2
so pallyheal1 must beacon tank2 BUT heal group1
it looks to me that pallyheal1 puts beacon on tank2 it tries to heal only group2