Resolve "On demand not working after switching to another model"

Closes #407 (closed)

added Bug Interpreter Testing labels

added 10 commits

• 0b537c8f...5a6bd887 - 9 commits from branch master
• 50264844 - add logging, do not call start() if not necessary

Compare with previous version

The issue was thoroughly caused by a bug in VRE Middleware. The bug has been fixed.

Here I made only some changes that facilitated the debugging process.

marked this merge request as ready

enabled an automatic merge when all merge checks for 50264844 pass

merged

mentioned in commit d9feb613