Adblock slows stops squences frequently.

[Firebolt391d]

Yeah i've had that happen when my browser is doing too much, or especially when there are tons of notes in a sequence. There's no way to tell if it's the adblock or if it's something else. If it's worse when you have adblock on, you could just disable the adblock.

But yeah ads can be pretty distracting too. Definitely look around and see if you can turn off any extra extentions. Maybe even just clearing your browser cookie data perhaps? Or maybe switching to a different browser (it looks like you were using Opera. I generally stick to Google Chrome, and it seems to work well for OS).
But hmm, idk.