question about TOC

[M.B. Schiekel]

Hi,

with LyX 2.3.7 and PDFLatex (pdfTeX 3.141592653-2.6-1.40.22) I do a 
normal Table Of Contents (TOC).
When the section numbers have 2 digits then in the TOC there is no space 
between the section number and the following section header, i.e.
   1 Chapter-1
   1.1 Section-1.1
   ...
   1.10Section-1.10

What I'm missing?
Thank you -
bernhard

-- 
M.B. Schiekel