Years of messing with resistor values until a senior tech set me straight

Been installing alarm panels for about 5 years now and always used standard 2.2k resistors on every zone. Last month a customer kept getting false alarms on their motion sensor and I couldn't figure out why. An old timer came out to help and asked why I wasn't using 1k resistors for that specific panel model. Turns out the panel's datasheet clearly recommends 1k for series wiring on certain zones and I'd been ignoring it the whole time. He showed me how mismatched resistance can cause intermittent faults that look like real alarms. Now I actually read the tech specs for every panel before I start wiring, saves me so many callbacks. Has anyone else dealt with a simple resistor swap fixing weird false alarm issues?

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