Derrick Bingener

@[MCQA] Blawik Answering your question, this happens when playing on Realms. Minecraft v1.21.73

This is not a duplicate request to MCPE-203831. When playing on Realms, I find that I cannot walk and hold down the mouse button to place blocks when building. I must click the mouse for placing each block where I want it, but not too fast, otherwise the block disappears and returns to my inventory. Up until the spring update, I was even able to run and lay carpet and blocks with no issues.

I’d like to amend my original post by mentioning that it also sometimes happens when placing blocks quickly, without holding down the mouse button continuously.