Trouble hiding Datum tags on a certain drawing sheet

Windchill guy here helping out one of my users. I am sure there is a well documented fix and perhaps you can point me in that direction. We have a very large assembly drawing which are using drawing reps to even be able to work on. One drawing sheet has been giving us problem where in some instances, dozens of ABC datum tabs appear cluttering the views. I've tried to create special layers to deal with them and we make sure to save status and we are using simp reps as best we can.

Here is where it gets funny. At one point we cleared this up, looked great. Obviously models at various levels get worked on but if I pull up the as-stored baseline of this drawing and execute the rep to get to this particular sheet, it looks great. No issues. If we turn on all sheets or other sheets that we need to work on and return to this sheet that was giving us problems, boom. The datum tags appear again. I was able to pull up latest on this drawing and repeat a similar behavior. The time delay in working with this drawing is difficult to I need to get to the heart of the problem. Any suggestions? I can tell you that there are regen issues noted in the assembly. I am sure it could use a good cleaning and fixing but I want to dedicate time to fixing this issue first if its not the cause. Any help is appreciated.