If you have a system that can accept certs configuration, then multiple calls to loadCACert or related functions will not reutilize the memory assigned.

https://github.com/sguarin/arduino-esp32/blob/caa8d07aafa04441bb85e6046a795249c01d9e39/libraries/WiFiClientSecure/src/WiFiClientSecure.cpp#L304

_streamLoad()
allocates memory for new certificates. A better approach should be using realloc().

https://github.com/sguarin/arduino-esp32/blob/caa8d07aafa04441bb85e6046a795249c01d9e39/libraries/WiFiClientSecure/src/WiFiClientSecure.cpp#L290