"thingSpeakRead Numminutes" is giving different size vectors for different fields | MATLAB IoT Analytics | Forum

I'm sending data from an instrument to this channel: 1135922, then processing it using Matlab Analysis, and writing it on this other channel 929257.

I'm reading the fields' data like this:
[fieldX,timestamps] = thingSpeakRead(readChannelID, 'Fields',1,'Numminutes',6,'ReadKey', readAPIKey)
fieldY = thingSpeakRead(readChannelID, 'Fields',2,'Numminutes',6,'ReadKey', readAPIKey)
fieldZ = thingSpeakRead(readChannelID, 'Fields',3,'Numminutes',6,'ReadKey', readAPIKey)
eulerR = thingSpeakRead(readChannelID, 'Fields',4,'Numminutes',6,'ReadKey', readAPIKey)
eulerP = thingSpeakRead(readChannelID, 'Fields',5,'Numminutes',6,'ReadKey', readAPIKey)
eulerY = thingSpeakRead(readChannelID, 'Fields',6,'Numminutes',6,'ReadKey', readAPIKey)
temperature = thingSpeakRead(readChannelID, 'Fields',7,'Numminutes',6,'ReadKey', readAPIKey)

The problem is, that every so often, the vectors end up with different number of elements with respect to each other. So, I end up having gaps in the processed data.

I have checked the data that I'm receiving from the instrument, and there is no gaps on the data. Every "timestamp" has ALL 8 fields of data, but Matlab Analysis is not reading it properly.

I wasn't having this problem with the free 15-seconds update rate, but when I upgraded to the paid license and started transmitting at about 2-3 sec, I started having the problem.

I would appreciate any help, as this is for my thesis and my deadline is in 2 weeks.