Up until a few days ago I had typically been running an A140 diode @500-550mA via a Flexmod P3 for a lumia setup. I hadn't driven it any higher than that but decided last week that I would turn it up to see what kind of power the diode actually outputs. I turned it up to about 850mA no problem but then disconnected it from power to move a few things around on the mounting board. When I connected it to power again the diode would flash twice and go out. The first flash would be significantly brighter than the second flash but then nothing. disconnect and reconnect power to try again and I get the same result. The only solution is to turn the current down to <500mA for the diode to lase again. Once the diode is lasing I can turn the current back up to 850mA but as soon as power is disconnected and reconnected the diode only flashes twice before going out. I need to turn the current back down in order to get it working again. I'm not sure if this is a possible issue with a bad connection to or from the driver or if it's an issue with the diode. All the connections appear solid as far as I can tell. I hear all sorts of talk from people about them driving these diodes to 1.2-1.4A without issue so I can't believe my 850mA was causing an issue but I can't be sure. I couldn't detect any significant heat from the mount that would indicate a thermal issue. Has anyone experienced this sort of thing before?