Bug fixes - I need your help

I'm going to try to fix as many bugs as I know how, but I need help from you.
There are several bugs that I know are real bugs, but they don't happen 100% of the time. So for these bugs, I need the simplest example of when they occur. So start a game with you and your opponent only having a deck of all basic lands. Use debug mode (F12, then right-click for options) to put the minimal number of cards into play / hand, and generate the bug. Then test the exact same circumstances and make sure it still triggers the bug. If you can isolate the bugs, hopefully I can address them.
Here are some of the bugs that I won't work on until they are isolated. And thanks in advance for your help.
-Rancor - doesn't always return to hand
-Pattern of Rebirth - Triggers multiple times
-Survival of the Fittest - Triggers multiple times?-
-Mishra's Factory - AI gets into a loop
-Several spells, including Prosperity and Martial Coup - AI counters a spell by playing spells or ability in response
-AI fetches Llanowar Elves from a Crop Rotation
-Strip Mine can destroy a Darksteel Citadel while it can't for a land enchanted by Consecrate Land
There are several bugs that I know are real bugs, but they don't happen 100% of the time. So for these bugs, I need the simplest example of when they occur. So start a game with you and your opponent only having a deck of all basic lands. Use debug mode (F12, then right-click for options) to put the minimal number of cards into play / hand, and generate the bug. Then test the exact same circumstances and make sure it still triggers the bug. If you can isolate the bugs, hopefully I can address them.
Here are some of the bugs that I won't work on until they are isolated. And thanks in advance for your help.
-Rancor - doesn't always return to hand
-Pattern of Rebirth - Triggers multiple times
-Survival of the Fittest - Triggers multiple times?-
-Mishra's Factory - AI gets into a loop
-Several spells, including Prosperity and Martial Coup - AI counters a spell by playing spells or ability in response
-AI fetches Llanowar Elves from a Crop Rotation
-Strip Mine can destroy a Darksteel Citadel while it can't for a land enchanted by Consecrate Land