I often find the same kind of struggle mid-late stage. The struggle is that there's a huge difference of open folding when you have close to 30 big blinds and when you have 40 to 45 bigs.
So I kind tend to adopt a rule of my own that is more or less like that:
If the post flop playing can affect my stack, in case I end up folding/loosing at showdown, letting me too close of the push/fold zone, so I elect to not play them.
But I keep studying, there's a lot of 'singular' spots that may happen and may escape from general rules.
Like other day I had 29 bigs mid stage pre-bubble, I got a 75s in the LowJ and I had some interesting insight because of my tight image and because of the other stack sizes after me. The process of thinking was: there's is just 1 player in the cutoff with more than 50 bb''s that is not getting out of the line. The others will jam their 20ish bbs with any super hand or fold exception made for the BigBling player that could defend a minraise with a big range. So, DESPITE of what result I could have, it looked to me as a good spot to steal the dead money without risking much or if you prefer risking on a less risky spot and in case I got called well... I had two cards.
But the result was: everybody folded and BigBlind flatted, I flopped monster, a str8 on the flop + the flush draw, villain called 2 value bets and folded the river little value. This pot made my stack to almost 38 big blinds!
Spots like that are not 'in the charts' and are based on table observation and prediction of the players actions, something that I would ever seen if I had two tables or more.
Best regards and keep studying the struggles! They make you better!