Placing a crafting table and trying to use it took me to the iPad home screen

Created a new world in survival mode, on hard mode, with no specified seed (I left the seed blank), with bonus chest on, show coords on, fire spread off, keep inv on, mob griefing off, and then turned activate cheats off after setting keepinv to on and mob griefing to off. Pretty much all other world options were left as they were set to by default.

Once I spawned into the world, i destroyed the bonus chest to get the contents within, then started wandering around and exploring a bit and stuff.

After a little while, I found a ravine that had lotsa gravel on one side/wall. I jumped into it and then a bit afterwards, I started to mine forward on layer 12, into the wall with the gravel on it.

A short bit later, I found some diamonds 😀
but of course, since I hadn't mined any iron ore yet on the world, I didnt have any iron or an iron pick yet to mine them with yet.

So, I decicded that now would be about as gooda time as any to make a crafting table for later and stuff, so I opened my inv and used 4 dark oak planks to make one, then closed my inv, turned around to face the other what, and placed it behind me.

But when i tried to use it, the screen turned black and sent me to the iPad home menu thingy for some reason. The game was still open or whatever, it just had kicked me outta it for some reason.

So, I went back into the game, clicked play, and went back into the world, however, when I did, I found that the game took my charecter back in time a few seconds or so, to before I made the crafting table and turned around and placed it and stuff, as I now had the 4 planks, no crafting table (placed or in my inv), and was now facing towards the diamonds again.

So I tried making it again, and did what I did before, used the 4 planks to make it, turned around to face behind me, placed it, and tried to use it. But got the same result.

Here’s some screenshots I took:
https://imgur.com/a/MkoQn5Q