Building in great height causes problems

[fairiestoy]

MinetestVersion: 0.4.7-bc5db9b
OS: Win7
Game: minetest_game
Reproducable: Yes

Description:

I have started building in a great height on my favourite server (current height is between 630.5 - 666.5) and i get a little annoying game freeze when start to set nodes where no nodes are under it. Once there are nodes under it or there have been some, it is no problem, but setting them the first time, causes a game freeze for a second and it only shows the selection box of the node. Then when the freeze ends, the node gets visible.

Up to now, i didn't asked anybody else to test this, but might be no problem if this information could be useful (especially for several different OS's).

Just wanted to make a note for this, but it doesn't harm gameplay somehow since you don't fall when the freeze ends because of not recognized shift anymore or something.

[sfan5]

That is because of the shadow generating below it

[fairiestoy]

Is it possible that i can not see the shadow anyway? Because on ground level there is no visible shadow (and that shadow has to be huge).
Anyway, thanks for the info.