Are two runs always required to generate a PDF when TEXMFCACHE is set?

$ sudo su -
$ mkdir -p /opt/context
$ cd /opt/context
$ wget http://lmtx.pragma-ade.nl/install-lmtx/context-linux-64.zip
$ unzip *zip
$ sh install.sh
$ exit
$ cat test.tex
\starttext
Test
\stoptext
$ export TEXMFCACHE=/tmp
$ rm -rf $TEXMFCACHE/luatex-cache
$ /opt/context/tex/texmf-linux-64/bin/mtxrun --autogenerate --script
mtx-context --autopdf test.tex
...
resolvers       | resolving | remembered file 'mtx-context.lua'
resolvers       | resolving | remembered file 'mtx-contexts.lua'
resolvers       | resolving | remembered file 'mtx-context.lua'
resolvers       | resolving | remembered file 'mtx-t-mtx-context.lua'
resolvers       | resolving | remembered file 'mtx-t-mtx-contexts.lua'
resolvers       | resolving | remembered file 'mtx-t-mtx-context.lua'
resolvers       | resolving | remembered file 'mtx-context.lua'
mtxrun          | unknown script 'mtx-context.lua' or 'mtx-mtx-context.lua'
$ /opt/context/tex/texmf-linux-64/bin/mtxrun --script context --version
mtx-context     | current version: 2021.04.10 17:09
$ mtxrun --autogenerate --script mtx-context --autopdf test.tex
...
mkiv lua stats  > runtime: 0.432 seconds, 1 processed pages, 1 shipped
pages, 2.315 pages/second
system          | total runtime: 3.318 seconds of 3.372 seconds

The first run fails; the second run succeeds.

If TEXMFCACHE is not set, then the first run succeeds. If TEXMFCACHE is set
to any non-empty value and $TEXMFCACHE/luatex-cache has not been created,
mtxrun always terminates with the same unknown script error.

What am I missing to ensure that ConTeXt will create luatex-cache in /tmp
when TEXMFCACHE is set and successfully build the PDF on first run?

Thank you!