Can somebody who can reproduce this issue enable debugging by setting the following in /etc/config/resolver
:
config resolver 'kresd' option log_stderr '1' option log_stdout '1'
And post somewhere logs when it is not working, in best case together with the following files?
/tmp/kresd/data.mdb
/tmp/kresd/lock.mdb
The best place for it would be knot-resolver issue: