Telegram API Error 429

[Knispel2]

The Telegram API documentation regarding restrictions on sending messages to groups says the following:

Also note that your bot will not be able to send more than 20 messages per minute to the same group

A message with two attached images is considered by Telegram API as two messages, so no more than 14 messages should be sent per minute with a delay of 8 seconds, so I don't understand what causes error 429.

I suggest to try increasing the delay to 10 seconds -- if that doesn't help, I'll look for another reason. With such a delay, even if Telegram API considers one message as 3 (text + two pictures), no more than 20 messages will be sent per minute.

[codecov-commenter]

Codecov Report

Patch coverage: 60.00% and project coverage change: +0.11 🎉

Comparison is base (55fb455) 69.54% compared to head (e3cda2e) 69.65%.

❗ Current head e3cda2e differs from pull request most recent head 756b120. Consider uploading reports for the commit 756b120 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #156      +/-   ##
==========================================
+ Coverage   69.54%   69.65%   +0.11%     
==========================================
  Files          17       17              
  Lines         614      613       -1     
==========================================
  Hits          427      427              
+ Misses        187      186       -1     

Impacted Files	Coverage Δ
...ilters/filter_anomaly_notification/filter_utils.py	64.77% <0.00%> (-0.07%)	⬇️
fink_filters/__init__.py	100.00% <100.00%> (ø)
fink_filters/filter_anomaly_notification/filter.py	94.87% <100.00%> (+0.27%)	⬆️

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