Possibly bugged since Saryn's rework by Pablo
This bug seems to happen only as CLIENT, not as HOST. It seems that Toxic Lash overrides most if not all status procs from your weapon when you have it active. This is a major issue for status-based weapons, and for people playing with Condition Overload on their melee.
Here's a demonstration with a 100% Status, Corrosive-Blast Boar Prime. Notice how a single shot would apply all of my status normally, but as soon as Toxic Lash is active, I