Pistons keep being transparent

Does not happen to me.

Should be fixed for 17w13b, see MC-114881.

Are you sure you are not using 17w13a?

Yes I am using 17w13b

There is

Sorry But Lawrence G Your using mods right?

@unknown, I don't see any evidence of it in his video

The pistons are disappearing and appearing again can you fix it?

Or I could be my computer used all it's RAM and I need to restart it. Mabey....

250 MB DRAM

Try dedicating 1GB.