Hmm I haven't encountered that problem but did you try reinstalling webman mod? It has these safety features built in for a very good reason so that $ony won't ban you for using homebrew on the console. Disabling syscalls normally disables your homebrew did you try launching any after that? It should give you an error. Try restoring them via Cobra settings on Custom Firmware tools if that doesn't work and try again. If that doesn't work try manually disabling them from CFW tools