Scott,
I used to have the problem of my amp going into bypass on digital modes all the time. Made it totally useless. However I changed the way I set up my radio and now the problem seems to be gone. A few years ago I read a recommendation that the levels for digital modes should be set as follows:? Set the radio for 100W (maximum for my radio) output, then use the audio level to drive it to get the output you really want. In this mode there is NO ALC going on at all, and I could easily get my FT-DX3000 to output a nice clean 30W or so. What I changed was to reverse this back to a way that seems to make more sense, and does work much better with the amp. I set the audio levels to just start bouncing the ALC meter, then adjust the power to get what I want. When I use the la-1k all I want is 5W which results in about 125W out. Now the problem is the temps keep climbing during longer transmissions. I probably would not have much trouble with FT8, but a 2-minute message using fldig sent the temp to 80!