With the development of new software there are occasions where released version are found to possess performance / user issues. IGI Ltd, have an extensive testing regime and if issues are identified both internally or externally through one of our customer users then we prioritise the fixing of these found issues ahead of the next release.
On our p:IGI+ website we do maintain a list of issues listed against the respective release version in which the issue occurred: https://www.igiltd.com/software/pigi/pigi-2/pigiug/known-issues/