SH1107 128x128 OLED text jumbled around

[chauens]

Hi,
I am using the Adafruit 5297 128x128 OLED with the U8g2 library and have a problem with the way the text is displayed. The OLED is mounted into an enclosure with its top pointing up as described on Adafruits website. Using a simple code to display "Hello World!" starting at line position 0 shows: "World! Hello" .
If I use rotation 90 degrees the text shows correct, correct sequence, but of course turned sideways... 90 degrees.
I can't turn the OLED in the enclosure and I want to use U8G2 since it offers the power save mode and more importantly has the option to define the boards I2C SDA/SCL pins since my board (ESP32 Feather) is not using the defaults.
Any ideas how to get around this? Any help appreciated.

This is the test code:
#include <U8g2lib.h>
#include <Wire.h>
#define I2C_Adr 0x3d //OLED I2C address
#define SDA 23 //sda pin# on ESP32 board is 23 (some boards use 21)
#define SCL 22 //scl pin# on ESP32 board is 22
#define rotation U8G2_R0 //flawed, but I need this rotation
U8G2_SH1107_128X128_F_HW_I2C u8g2(rotation, U8X8_PIN_NONE, SCL, SDA);
void setup(void) {
int i2cAdr = (I2C_Adr * 2); //per u8g2 reference manual address must be multiplied by 2
u8g2.setI2CAddress(i2cAdr);
u8g2.begin();
u8g2.setFont(u8g2_font_helvR10_tf);
}
void loop(void) {
u8g2.clearDisplay();
u8g2.drawStr(0,15,"Hello World!");
u8g2.sendBuffer();
delay(500);
u8g2.drawStr(0,30,"1234567890");
u8g2.sendBuffer();
delay(1000);
}

B.t.w. "1234567890" displays like "567890 1234"

[chauens]

I uploaded a shortened version of Adafruits "Hello World" test onto the ESP32 board and found that the text is displayed correctly. So it seems to me that the problem is in U8G2.
Note: my test results seem to prove that Adafruits code expects the I2C SDA pin to be 21. Therefore I connected the SDA of the OLED to pin 21 on the ESP32 board, even though my ESP32 board has the SDA mark on pin 23.
I would like to stick with u8g2 for the power save mode (screen saver).

[chauens]

Using the Adafruit_SH110X.h and Adafruit_GFX.h libraries provides the solution to the problem as well as a "screen saver" as I just found out. So I wil go this route and close this discussion.