Moving object+label shows the description with offset

[jirislaby]

With Librecad 5fff324 and this drawing:
http://www.fi.muni.cz/~xslaby/sklad/rozvadece.dxf

While I am moving "Pracovna zás. (4)" with corresponding "Jist 16A" from 1NP to 2NP using "Move / Copy", the descriptions are rendered with an increasing offset (both x-wise and y-wise).

When the move/copy is finished, I cannot see the description. It is maybe rendered somewhere else.

When I save and reload the drawing, the labels are rendered correctly.