@zundan Oh!!!
Is this the problem everyone's been having?! How did you manage to find it?
And I never noticed it because I'm still using 2.6.6 in production...
@Gargron I've just noticed this Ruby's bug in a PR to a work related code, while I personally haven't been able to reproduce Sidekiq hanging after a while as Heroku restarts processes every 24 hours.
@spla @zundan Can you try switching to Ruby 2.6.6? I believe your Sidekiq should no longer get stuck then