geom_text: too small label size when applied log10 transformation

[ASmirnov-HORIS]

Example:

ggplot({'v': [1e10]}, aes(x='v')) + \
    geom_point(aes(size='v'), y=0) + \
    geom_text(aes(label='v'), y=1, size=10) + \
    scale_size(trans='sqrt')

Output:

Expected (like in ggplot2):

[alshan]

Since size=10 in geom_text() the size scale does not affect size of the text regardless of trans.

Is this issue about a difference in interpretation of size in lets-plot vs ggplot2? In lets-plot geom_text size is in px (doubled). I.e. 20 px in this case. In ggplot2 it might be pt or other units.

Please clarify.