Please try to disable “Crystal Image” on the image page of the vorpX ingame menu. That eases the GPU workload and might help in case the GPU operates at it’s limit.
Regarding you general injection issue, please check whether there may be some other program interfereing. Many programs also hook into games and can cause such an issue. Not all of them are obvious.
Hottest candidates are: virus scanners, any sort of CPU/GPU utilities, game video recording/streaming software, chat programs and generally everything that can show notifictations in games.
Best way to trouble shoot this is to disable/uninstall background processes and any potential bloatware that would not be there after a fresh, Microsoft only Windows install.