Hi, Villager! ;)
The game might behave in such a manner when influenced by an unstable internet connection. While playing with a mobile device, even with a good WiFi connection, you’ve got walls, obstructions and other household interference to consider.
Things that will consume bandwidth and produce lag is any downloads you have going on, like the Apple Store/ Google Store, and also the activity of other people in the house.
Also, power saving mode, graphics settings, low RAM memory, and an outdated operating system and/or router can decrease game's performance in certain cases.
We are constantly working to check our servers and create better game experiences in every update. However, there is still a long list of things that can affect your gameplay.
Please try using different internet connections or WiFi networks to see if the issue persists.
Block Craft Team