Cloudwtach FilterLogEvents is not working with logStreamNamePrefix

I was having a similar issue with getAllLogEvents.

I found CloudWatch Logs to be very unreliable and inconsistent.

e.g. I called a log stream multiple times in getAllLogEvents multiple times on Tuesday. Got 0 messages. I called the same log stream on Wednesday. It gave me some messages

Similarly, I called another log stream multiple times on Friday. On my 44th retry, I ended up getting the messages in that log.

And the issue is not only in the function. Same thing happens in CloudWatch website/console/UI. The same page will show 0 events, and later show normal number of events.