10-sec-strategy-difference-between-number-of-Init-Exec-calls-and-candlesticks-in-one-minute

Hi,
At 237 10 second rounds here were the start of Init/Exec call to start of the next call stats:
Min: 8.5 seconds, Max: 11.5 seconds
The duration of the calls was:
Min: 1.00 second, Max: 3.25 seconds
Each minute had six calls as expected.
Then the time to the next call jumped to 29.3 seconds. Please see image.
The calls stayed erratic after this point.
Some minutes had 3 calls and some 18 calls.
BUT: throughout, as seen in the chart, candlesticks kept coming at regular intervals.
It seems WL8 gets data from Schwab at regular intervals.
These are written to the chart the same way,
But somehow the calls to Init/Exec are erratic.
Can you please can take a look.
My trading code can survive some range of behavior but not to this extent.
The 1 minute signaling strategy has been working fine.
Thanks!