RDS for mysql - Aborted connections

hello community ... after trying everything i found on the INternet about the communictaion problem i have with my RDS for mysql i hope you can help me with this problem. I run a RDS Instance on mariadb 10.6 which communicates with 15 EC2 machines they write data to the RDS and 50 - to 60 times a minute i get an "aborted connection - Got an error reading communication packets" error ... even if i try ty access it with phpMyAdmin connection is lost after 5-10 clicks i already did all the workarounds with the parameter groups which helped nothing ... can you help me ? regards rob