Hi Wolfgang, 

two files with the difference are attached.

I thought about the current beta -- it could be good way for me but 
unfortunately it does not suit for my students.

Tomáš

Fri, Jan 17, 2020 ve 07:40:57PM +0100 Wolfgang Schuster napsal(a):
# Tomas Hala schrieb am 17.01.2020 um 15:18:
# >Hi all,
# >
# >if I compile the following (minimised) code with ConTeXt from TL2017,
# >I receive expected result -- one framed gray box with correct width.
# >
# >\starttext\showframe
# >\defineframedtext[MPT][background=color,backgroundcolor=gray,width=\makeupwidth,frame=on,offset=1cc,]
# >\setuptyping[MP][before={\startMPT},after={\stopMPT},]
# >\startMP bla \stopMP
# >\stoptext
# >
# >Now I tried it with ConTeXt from TL2019 (TL2018 produces the same result as TL2019)
# >and I have got _two_ boxes -- the outer one is correct and frames the typing environment
# >as in the past whereas the new box frames the text inside the typing.
# 
# Your example works fine with the current beta and since you don't
# show the differences between the different installations there is
# nothing which can be done.
# 
# Wolfgang