After trying the Fade-in and Fade-out great example project of @Kyle_Williams
I believe now it’s not a blocks problem, but it’s a UI issue ( I think it’s general issue with low performance devices ) as the example has only 147 blocks ( small project ) works great on good performance devices ( like XS Max ) but lagging on medium devices ( like 5s Realme note7 )
Or what do you think ?!