I feel like I've read this update before?? has it appeared in another chapter?

I don't remember it. But maybe, they've done that kind of thing before.

I don't believe it has but there was a chapter Onoe left his jacket at Masayans place and he tried to give it back but Kabu/Onoe were being lovey dovey so he hesitated to interrupt.

http://www.mangago.zone/read-manga/ameiro_paradox/mf/mi_chapter-9/pg-82/

There's been multiple instances where Kabu got jealous over him too.

it's different this time. it's just that he always ran into them in the most awkward moment