Intermittent input lag on stm32 when multiple tasks are running

Hi everyone, quick question. I’m working with stm32 and noticing inconsistent response times when handling user input alongside other background tasks. It’s not a crash, just delayed reactions that show up randomly.

I’ve seen similar timing issues before in interactive apps and even while testing word-based learning games for improving spelling speed, where small delays in input handling made a big difference in user experience.

For STM32 projects, do you usually trace this back to interrupt priority, rtos task scheduling, or clock configuration? Any common pitfalls I should check first?