Serial Shadowban in last 2-3 weeks

Even my oldest and most trusted accounts, which the algorithm usually considers reliable, have been caught in an insane shadowban storm. Normally, these accounts recover from a shadowban in 4-5 days at most but they've been dead for two weeks now.

for some of them, I logged in and kept doing normal activities every day, while for others, I didn’t touch anything... neither worked. ( normally one of these two would definitely provide a solution)

Does anyone know what’s going on with Twitter lately? Any insights or suggestions?

Can't testify to the frequency or how it is for most but can speculate on some things. Extended restrictions even on accounts that usually recover fairly quickly could mean there are some newer and stricter flags. If that's the case, I'd say it's an adjustment on some internal trust signifier. Point is, accounts which are usually safe aren't only caught, but they're also hit with the lengthy restrictions. If activity and inactivity don't factor at all then it's likely a more systemic sort of change going on there so a lot of uncertainties there.

I got the notification of a temporary label 2 weeks ago, went inactive for that time and when I logged in today the label was still there, posted again and my engagement is totally gone.

Did you ever recover any of your accounts? Or they are still shadowbanned?