The phrase "future patch" refers to updates or fixes that will be made to a software or a game in the future to solve problems, improve functionality, or add new features. Full definition
The overall quality for this game is already pretty high for a recently released early access title, however there are a few problems that I would like fixing in future patches. (ugnnultragamingnewsnetwork.com)
That's why they decided to make it a full game update, with future patches expected to be much smaller in size. (thesixthaxis.com)
The development team will get every single report and will work on the problems for future patches. (thatvideogameblog.com)