orux 10.0 GP theme "Elevate" doesn't work with VTM viewer - it works if NO Vtm

[ut]

Hi, using an old android 7.1.1 orux 10.0 GP works perfectly with OpenAndroMaps and and map style "elevate" (last version 5.2)
that I can configure (picture A - mtb, for instance).
However if I activate VTM viewer the theme "elevate" doesn't work (picture B): why??

Ps: the same thing with previus 9.7beta18 as described
https://oruxmaps.org/forum/index.php?topic=41039.msg55130#msg55130