We have some UI-related stutters left that we know about. We replaced Gameface with a custom HUD engine for most of our hud elements because the performance wasn't good enough to preserve a smooth experience, but there's a few things that we are still using this product for, for some reason or another (kill feed, crosshair, chat, announcer text messages and other stuff I may be forgetting now). Even though these are very simple elements sometimes Gameface will block for excessive amount of times when updating the view with these elements. Your 1-2 second stalls are very severe, but I'm not surprised these stalls manifest magnified in some systems for some reason or another, the spawn timing matches up with this since the Gameface view is active at around that time. Hopefully sometime soon we should have an update mentioning getting rid of some stutters related to UI rendering, which will mean we have completely gotten rid of those remnants of Gameface usage completely during gameplay and just use it in the main menu, if this doesn't fix it for you then, I'd appreciate if you DM me in Discord and I'll send you something to analyse the stalls.