Does Upgrading Laboratory Stop Research?

It is possible to upgrade the Laboratory itself while an upgrade is happening, but the upgrade will not continue while the lab is upgrading, and they will never be applied until the building upgrade concludes. However, you cannot start new research projects if the building is upgrading.

Does upgrading laboratory cancel troop upgrade?

Also when upgrading troops plan ahead because unlike when upgrading buildings you can't cancel troop upgrades in the laboratory. If you start research and then upgrade your lab before it has done, the research is halted until the upgrade completes.

What does upgrading STAR laboratory do?

Upgrades may improve their hitpoints, damage, their special ability, or the number of the same type of troop that is able to fit into one Army Camp.