We have VERY SIMPLE Application that causing 2 problem:
-SQL errors (99% of time it's :(2006, 'MySQL server has gone away') )
the application is so simple that it's LESS THAN 350 lines of code ! (including DB Models and Flask-Admin module )
23 freelancers are bidding on average $52/hour for this job
I have 10+ years of experience in development and have worked for high traffic websites using python/flask and django. I have faced these kind of issues number of times and expert in fixing it.
I encountered such a problem. The problem was related to the load on Mysql. Parameters need to change wait_timeout and max_allowed_packet. Perhaps other sites overloaded mysql. I will be glad to help you.