Outbreaks and pseudo-outbreaks related to contaminated germicides have most commonly been reported with contaminated antiseptics. Outbreaks from contaminated high-level disinfectants have rarely, if ever, been reported. Outbreaks from contaminated intermediate- and low-level disinfectants have occasionally been reported. All outbreaks associated with contaminated germicides have occurred due to gram-negative bacilli or mycobacteria.
- Weber, D. J., Rutala, W. A., & Sickbert-Bennett, E. E. (2007). Outbreaks associated with contaminated antiseptics and disinfectants. Antimicrobial agents and chemotherapy, 51(12), 4217-4224.
Weber et al suggest that the most common issues are with antiseptics rather than disinfectants, per se, where the distinction is that antiseptics are those applied to tissue and disinfectants are those applied to surfaces/inanimate objects. Indeed, your original source also refers to antiseptics rather than disinfectants.
The same chemicals can be used as either in different formulations, so that might lead to some confusion. The citation mentioned contains references to several particular incidents and tables detailing the likely cause; for several of the issues with antiseptics, it seems the contamination was traced to water used to dilute a disinfectant, improper storage, and contaminated bottles or tubing.