Good chapter.
Jiji was an idiot in this chapter, but like you said, from his angle, because he remembers her, and when you think about it, their dynamic hasn't changed much. Like when Jiji was first introduced, the whole issue of Momo being teased about being psychic was already dealt with. They are hitting it off as old friends, like when Jiji was introduced. Meanwhile, for everyone else, shit is fucked up.
Honestly, thinking about it now, it has me thinking Tatsu been planning this amnesia thing for a while. Ever since, at least he split the group up. As stated, JIji & Momo's relationship hasn't changed. Vamola's personality is much more positive about reconnecting on Momo than dwelling on what happened.
Overall, I do have a better feeling going forward since Okarun is tackling the problem rather than being afraid of it. He is trying to be what Momo was for him early in the series, as she wanted to spend time with him.