Having troubles with impressions and reach

Hey, I got an automated memepage and carpage running. They have 5k and 12k followers but lately I'm having troubles with my reach and impressions. Same goes for my girlfriend. She's got a personal account with 20k followers. A few weeks ago I would usually get ~500 likes per post on my memepage and ~800 on my car page, now I only get like 100 likes on my memepage and 150-250 on my carpage. My girlfirend also started havin this type of trouble just a few days ago. Her last 3 post only got like 900-1k likes and were shown to only 4k folowers. Usually she would get around 1-3k likes w/o good hashtags. With good hashtags it usually goes up to 5-8k. Any idea what is happening? I started doing f/fu on her account like 4 weeks ago, could that be the reason?

follow/unfollow could easily be the reason!

Well she had an engagement of ~18% considering she had old posts up with 800likes and almost no comments thats a good engagementrate and now because of barely 2k followers which she got cuz of f/uf it should drop to like 5%? I think there is something wrong with ig right now. Also I never done f/uf on my pages and the engagement also dropped D: Furthermore the settings used were so low ~ 60 f/uf a day.