Blocks disappearing when breaking them in survival.

As I'm breaking my blocks in Minecraft, on survival, they are not going into my inventory but rather disappearing. For example if I were to break a piece of wood with an axe the piece of wood would disappear the same way it would if you were to be in creative. People have told me it's a glitch and I've refreshed Minecraft and my device multiple times. This is the first time this has occurred. It really saddens me to not to be able to play on survival because of the lack of materials, considering I can't break anything and it go into my inventory. I hope this issue can be resolved soon. I love Minecraft and I have been playing since it first came out. Hopefully you can fix this soon, thank you so much. - fellow Minecraft player