diff --git a/lib/default/TasmotaSerial-3.3.0/src/TasmotaSerial.cpp b/lib/default/TasmotaSerial-3.3.0/src/TasmotaSerial.cpp
index 8b21de109..07754719e 100644
--- a/lib/default/TasmotaSerial-3.3.0/src/TasmotaSerial.cpp
+++ b/lib/default/TasmotaSerial-3.3.0/src/TasmotaSerial.cpp
@@ -153,10 +153,10 @@ bool TasmotaSerial::begin(uint32_t speed, uint32_t config) {
       m_uart = tasmota_serial_index;
       tasmota_serial_index--;
       TSerial = new HardwareSerial(m_uart);
-      TSerial->begin(speed, config, m_rx_pin, m_tx_pin);
-      if (serial_buffer_size > 256) {
+      if (serial_buffer_size > 256) {  // RX Buffer can't be resized when Serial is already running (HardwareSerial.cpp)
         TSerial->setRxBufferSize(serial_buffer_size);
       }
+      TSerial->begin(speed, config, m_rx_pin, m_tx_pin);
       // For low bit rate, below 9600, set the Full RX threshold at 10 bytes instead of the default 120
       if (speed <= 9600) {
         // At 9600, 10 chars are ~10ms
diff --git a/tasmota/xnrg_19_cse7761.ino b/tasmota/xnrg_19_cse7761.ino
index c61322d30..ec6647a76 100644
--- a/tasmota/xnrg_19_cse7761.ino
+++ b/tasmota/xnrg_19_cse7761.ino
@@ -137,7 +137,7 @@ bool Cse7761ReadOnce(uint32_t log_level, uint32_t reg, uint32_t size, uint32_t*
 
   uint8_t buffer[8] = { 0 };
   uint32_t rcvd = 0;
-  uint32_t timeout = millis() + 3;
+  uint32_t timeout = millis() + 6;
 
   while (!TimeReached(timeout) && (rcvd <= size)) {
 //  while (!TimeReached(timeout)) {