Keep the codes the same for every insubstantial update? What are you, crazy? You gotta pay for those ladder climb and jump animation updates that no one asked for, plus the ability to unlock those cosmetics you unlocked during the last update.
Bless this site for giving us the option to play this for free. These devs are sinfully slow with updates, and when they do update, they've only added something no one who wants to whack off to this asked for in the new update. I'm hard pressed to find anyone sane who would give them monetary support based on how VersusX Studios allocates their resources to crap that probably shouldn't take priority. What gets added or improved with each update is horrendous. It's like if you were told to write an essay with a week to finish it, and by Day 6 of 7, all you've written is your name at the top right and which class you belong to.
(apologies for picking your post to rant to, I just really find VersusX Studios incredulous, as someone who's kept an eye on this Bioasshard Arena project since 2019)
Anyway, just in case, are you using codes that came with the newest update? The devs change the codes for each tier of patrons for each update, so reusing the codes that got you unlocks in the previous update won't do you any favours here. From the times I've used the codes in less recent updates, I haven't had any problems with the codes themselves, though.