With all the stories of Russian troops being fired upon by their leaders if they chose to retreat during suicidal attacks, were there ever times when they would essential resist and forcefully disobey orders?

I'm not sure of any specific instances so I won't answer the question, as it's not a topic I'm too familiar with. But I feel it should be noted that the idea of the Soviet's employing mass Human waves and throwing men at the Germans in suicide strikes is largely a myth invented by a mix of the Germans, amateur historians (in Hollywood especially), and the Allies in the Cold War hoping to discredit the Soviet's participation in the war.

Russia was mostly on the retreat for the beginning of Barbarossa, and didn't have much opportunity to waste soldiers by throwing them into a meat grinder. By the later half of the war, they had taken a doctrine similar to the German's own (developed before the war, but not put into real practice until now), and improved it past what the Germans had expected. Soviet Deep Battle was a mix of German encirclement tactics and Combined Arms warfare, emphasizing units working together on a strategic, operational and tactical level, between air, land and sea assets.

The only time Human waves would be used in actuality would be Stalingrad, where factory workers volunteered (and were enlisted) en masse to try and hold off the Germans, but even that was only for the very beginning of the siege, because of course as it went on, the Red Army had gathered a defense and then encircled the German army there. The 'one man has a gun the other has a bullet' is also a myth about Stalingrad, also started by Hollywood (thanks, Enemy at the Gates).

Soviet morale was also fairly high for much of the war. They were effectively fighting a war of annihilation, after all, there wasn't much doubt that the Germans wanted to destroy the Russian way of life. Most German support in the Soviet Union came from those who were already fascists or ethnic groups trying to break free, or both, as we see in pro-German groups in Ukraine in the time. Things like the Commissar Order only further nailed this home for most Russians.

But the Soviet's experienced German aggression and saw its brutality first hand. Everyone lost family in the war, and if they didn't they still felt the crushing economic and social damage the war was causing. While there were of course discipline problems, morale wasn't a major issue after the very beginning of the war when the Soviet Army was constantly on its back foot (then, retreat was common, but on an operational level and ordered, not a complete route), when the German army lost steam and the Soviets began their counter offensives, the German's never really managed to recover any momentum, and there wasn't much worry for Soviet soldier's fleeing afterwards.