pcA reduces the color depth by default to save bandwidth & increase speed, which will affect the appearance of the remote's desktop, though you can override that in pcA's preferences (at the expense of speed). CXP uses alpha-transparency which pcA doesn't handle well. I've found it quite simple to just use the CTRL-SHIFT-C toggle to disable CXP on the remote at the end of the day & re-enable it with the same toggle next day, though I admit that inevitably the time I need to connect is when I've forgotten to toggle CXP off.