phew, noticed there was a chapter-gap as the chapter were loading, so I managed to close it before getting spoiled.
And I finally figured out why mangadex sometimes spoils me by letting me read chapters with a gap since last: seems the gap-protection doesn't activate for chapters with this naming convention (volume.chapter or chapter.part-out-of-10). Always got kinda peeved when I didnt realize there was a gap and notice halfway (through references to prior chapters in said gap) forcing me to abort mod-chapter :/