I don't know when the next official update will be but if you open a Support Ticket you can get access to a pre-release build that's available for testing.
That's not a known issue as far as I am aware so can you please send us a sample of hands and a support bundle that was created after the report and attach those to a Support Ticket where we can investigate this:
That's fine although you don't need to use tourney_hand_summary.str_aggressors_p LIKE '8%' since that would always be true in any hand. Even if you were to use tourney_hand_summary.str_aggressors_p LIKE '89%' that wouldn't be necessary either because it's already inferred by other things in the expr...
I don't know when that will be available. If you would like to be automatically notified of any change in this regards then you can let us know via a Support Ticket.
If Hero is also potentially limping (which will add to the number of limpers) then try this expression filter: cash_hand_player_statistics.cnt_p_face_limpers = 1 You can use this expression filter in a custom report by clicking on the 'Filters' link and selecting 'Add New Expression Filters' and you...
What are your settings in PokerStars and PokerTracker 4? If PokerStars is not setup correctly then only a limited number of hands will import into PokerTracker 4 so please check your configuration:
You can filter for the opportunity to raise limpers in 'Actions & Opportunities -> Preflop -> Preflop Opportunities' and the number of limpers via 'Hand Details -> Preflop Limping That Occurred':