It happens at various times, and intermittently in a given session. For example, it just happened now (8:36am US Central time) when I hit "reply with quote". But no problem in about 3 min. of APUG access just prior.
Interestingly, everything seems to be fine for the past few days. Nothing changed (that I'm aware of) at my end. But response seems great. Of course now I've jinxed it.
"Far more critical than what we know or do not know is what we do not want to know." - Eric Hoffer