My MASTER rank performance is pretty bad...

Today I mostly played on MASTER difficulty (28-30), but I was making mistakes and hitting consecutive GREATs in places I'd normally never miss, while succeeding in parts I usually can't, so my performance was really bad... 😭 Normally I can just power through with the rhythm even if I can't see the notes, but the moment I get a GOOD, my rhythm breaks and I can't power through anymore 😭 Is my reaction time getting worse... Or is my phone starting to lag...