Often block animations will be frozen with no other visual glitches (no lag etc.) Blocks affected are:
kelp, sea grass, water, flowing water, lava, flowing lava, soul sand bubble columns (still function), magma block bubble columns (still functions), magma block, fire.
I assume all animated blocks are affected but these are the ones I have seen in my survival world. I have not had it happen in creative.
P.s. this is on an iPhone 8+ but there is no option for that.