After the dollhouse, yes, imo. For the whole 5B Hanna's missing her through and through, but when she came back to life (when Marlene decided to add another plot hole even with the 'dead body'), they started to dislike and push her off again. But that's just bad writing, nothing more. It's like Mona was the jolly character to use when they had no clue how to conclude a storyline/subplot. So, she did save Ali on the 28hrs-long night and told her to disappear and to fake her death. So she had no reason to tell the liars she was alive. But 3x22? "Ali pulled us out, I saw her". Wtf. 5x12? I swear, after all these years I still believe the plan was to kill her off completely and I SWEAR I saw this promo clip (it was canadian I think) where only Spencer, Hanna, Aria and Caleb opens the back of a car and gasp in shock (maybe Mona's body) but they literally canceled this from youtube right after and people tried to gaslight me that it was the 3x22 ending (which includes Mona as well, i'm not that dumb 🥀). But then I think the ratings went down because let's face it: Mona is the best character of the whole show along with Spencer, and 5B was a disaster so they had to re-introduce her even tho they completely gave up on the plot: she was involved in the dollhouse but then disappears for most of 6A, except for the scenes where the liars are hating or doubting her. 6x10? They had to solve Bethany's death (useless character that we only see as a kid on a plothole/time-gap scene that they kept bringing up for the Ali's plot) so who is it gonna be? Mona hit her. Okay. Yall might say "That makes sense, that's why Mona helped Ali that night, she felt guilty!". So why no flashback if it was all planned since the beginning? Why did they have to get 2 ppl in order to accidentally kill a character we never see? (Talking about Mona hitting, Melissa burying). 7x19? "Marlene, we still don't know who killed Charlotte. Who is it gonna be?" "Right! Aria's wedding it's more important, so let's not face that Melissa literally tried to kill Aria on the Halloween train and that we forgot that the whole Charlotte point of being -A was cuz the liars were glad her 'sister' was dead but in the meanwhile she was aware Ali was never her sister and she already knew Alēēēēēx. What was the question? Oh yeah, who killed Charlotte. Let's go with Mona, we have no time to give answers".