Hi! There have been spots in my world where lines would just pop up. It's frequently been seen in 1 block deep large bodies of water. It's shown up around 3 times in the lake but just recently it's been happening to glass blocks. It's like it was trying to replicate my hot-bar with the glass and as if a solid block were in the way with the water.

It has just shown up. Me, nor my friend (running MCPE for IOS) who can only see the water glitches, have been near the water. Normally when we saw the one with the water we just left it be. We can walk through it, see clear air when we swim in it. However when we destroy the blocks below/around it, it's gone. 

My friend wasn't around to see the glass glitching. It was just like the water except it was connected to an actual block. I destroyed the block and then it was gone. I placed it back down and it returned. I thought if I did it again but wait for a few seconds (like 5) before placing it again it would be fixed, and it was. 

I'll try to collect screenshots every time I see this happen, please feel free to contact me by Gmail if you need more information. Thank you!