No idea how to describe this so searching found nothing.
When your in water and you leave to go onto land, but you are pressing the hit/attack/dig etc.. button, it continues to do so when on land and you will bash away at nearby structures until you hit again manually a few times to turn it off.
I think its happened since version 1.2 but I thought there would be sufficient community feedback on this I would not mention it. But apparently not.
Linked issues
duplicates 1
Comments 5

dont think it is the same as I can move, rotate, stop and start moving etc.. all the time my hand is bashing away at the surroundings.
It only happens when exiting water onto land if the action (hit things) button is pressed at the same time (somehow easy to do on a mobile device).
It only stops if you press the action button several times.
Happens with my friend who is also using an LG V20 Android phone and again, it has been happening for a month or two of updates.

dont think it is the same as I can move, rotate, stop and start moving etc.. all the time my hand is bashing away at the surroundings.
It only happens when exiting water onto land if the action (hit things) button is pressed at the same time (somehow easy to do on a mobile device).
It only stops if you press the action button several times.
Happens with my friend who is also using an LG V20 Android phone and again, it has been happening for a month or two of updates.
Thank you for your report!
However, this issue has been closed as a Duplicate of MCPE-33470.
Please add a vote and any new information to the main ticket, which will be updated accordingly.
If you have not, you might like to make use of the search feature before making a new ticket, as it's likely that the issue has been reported already.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Feedback – 📖 Game Wiki
Thank you for your report!
However, this issue has been closed as a Duplicate of MCPE-33470.
Please add a vote and any new information to the main ticket, which will be updated accordingly.
If you have not, you might like to make use of the search feature before making a new ticket, as it's likely that the issue has been reported already.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Feedback – 📖 Game Wiki
Sounds like MCPE-30151