I have an case where I have created one custom patch is 2015 using the custom module code and which was moved to processed to the production.
Now in 2017 I have created another patch using the Same custom module code which I used in 2015 (Note 2015 patch was not present in my dev box while developing the 2017 patch)
Now in production we have both 2015 and 2017 patch is present.
The case which I observed that in few random case environment is using 2015 patch to execute the code(so the 2017 code changes is not working).
Where as per my knowledge Livelink will always use the latest patch code if there are multiple patch for same function based on patch created date.
Testing already: Patch 2017 and 2015 is present on the server and code for patch is same in all the case.
Does any one have idea on this point how\ in which sequence livelink will load the patch.