Hi Dave,

Perhaps this extract from User Guide explains a bit:

7.3. Auto-Sequencing
The T/R cycles of many WSJT-X modes allow only a few seconds to inspect decoded messages and decide how to reply. Often this is not enough time, so for FST4, FT4, FT8, MSK144, and Q65 the program offers a basic auto-sequencing feature.

73, Reino OH3mA