Data gaps in some feeds

Hi there,
Lately I’m having problems with my Solar Inverter data sent from raspberry pi to
On the Pi I can see the data constantely incoming but they are not received from the website.
Data gaps of up to 1 hour occur. Has there been an update recently which i missed, that could have caused those issues.
Also strange, that sometimes one feed is logged corretly while anotherone is missing data with the same timestamp.
This is my website:

Thanks in advance for your help,