heat bed stalls print (no replies)

Hello,

Lately, I have been seeing issues relating to my print bed heating. Printing pauses repeatedly because of the heat bed (I think):
Recv: T:239.94 /240.00 B:64.93 /65.00 @:86 B@:88 W:?
Recv: T:239.81 /240.00 B:65.06 /65.00 @:89 B@:47
Recv: T:240.00 /240.00 B:65.02 /65.00 @:84 B@:61 W:9
Recv: T:239.94 /240.00 B:65.00 /65.00 @:85 B@:66 W:8
Recv: T:240.16 /240.00 B:65.05 /65.00 @:78 B@:51
Recv: T:240.00 /240.00 B:64.98 /65.00 @:82 B@:71 W:7
Recv: T:240.16 /240.00 B:65.01 /65.00 @:78 B@:63 W:6
Recv: T:240.00 /240.00 B:64.96 /65.00 @:82 B@:78
Recv: T:239.88 /240.00 B:65.02 /65.00 @:86 B@:61 W:5
Recv: T:240.16 /240.00 B:64.95 /65.00 @:77 B@:81 W:4
Recv: T:240.08 /240.00 B:65.03 /65.00 @:79 B@:56
Recv: T:240.00 /240.00 B:65.03 /65.00 @:82 B@:57 W:3
Recv: T:240.16 /240.00 B:65.02 /65.00 @:78 B@:62 W:2
Recv: T:240.08 /240.00 B:65.02 /65.00 @:80 B@:62
Recv: T:240.23 /240.00 B:64.98 /65.00 @:76 B@:72 W:1
Recv: T:239.94 /240.00 B:64.97 /65.00 @:84 B@:76 W:0

I am not sure why it seems so sensitive in that it seems to stop when the temp drops by a 0.5 degrees. I use a mosfet board and the voltage to and from the bed is around 11.6V. The resistance of the bed is around 1.6 ohms, which seems typical. Has anyone seen this type of problem?

thanks!