[NTG-context] issue with doublesided layer

Dear list, I have the following sample: \definelayer[layer] [doublesided=yes] \setlayer[layer] {layer} \setupbackgrounds[text] [background={layer}] \starttext \null \stoptext Simply defining a doublesided layer breaks compilation in LMTX. It works fine with MkIV. I’m using current latest from 2021.01.18 18:19. Am I missing something or is this something that needs a fix in LMTX? Many thanks for your help, Pablo -- http://www.ousia.tk