Is iOS app suddenly very slow?

I have been using TickTick for many years, and it's always been very responsive. For the past week (?), some clicks (like clicking snooze or choosing a snooze time) take up to 2+ seconds to respond.

I'm using an iPhone 17 with iOS 26.5.1 TickTick version 8.0.91

EDIT: Tried uninstalling/reinstalling. No luck. Some clicks can take 3 or more seconds to respond. It's almost unusable. Just checking something off can take 1.5 seconds sometimes.