Using U8g2 inside an independent class

Other Hardware Displays
1

I'm trying to create an independent class to handle drawing all of the necessary graphics for an SSD1305 display over i2c. I wanted to try doing it with U8g2 library but whenever I try to draw the screen, it crashes.
Initially I ran into trouble initializing but found a thread in the 'issues' on the github page for the library where someone did a similar fix to what I ended up doing: running begin() within an init method.

But now where I'm trying to draw the screen it is crashing the arduino. To make sure it wasn't something in my code, I pulled the drawLogo() function and used that code to create a method in my object to call in the do...while loop and it still crashes. (it doesn't seem to matter if I define for small logo or not - I should also add it was also crashing on my own code which is why I switched to something from the examples instead. And my own code was working within a single structured page)

I even scaled down the code to post as this example and ran it as a test to make sure the bare minimum still exhibited the same behavior.

Any help finding the problem would be appreciated!

relevant code: (file RpuiSSD1306.h)

#ifndef Arduino_h
#include <Arduino.h>
#endif

#ifndef _U8G2LIB_HH
#include <U8g2lib.h>
#endif


//#define MINI_LOGO

class RPUISSD1306 {
private:
    // private variables
    U8G2 u8g2;

public:
    // constructors
    RPUISSD1306(void) {};

    void initDisplay()
    {
        U8G2_SSD1306_128X64_NONAME_1_4W_SW_SPI u8g2(U8G2_R0, 3, 11, 10, 9, 8);
        u8g2.begin();
    };

    void drawLogo()
    {
        uint8_t mdy = 0;
        if ( u8g2.getDisplayHeight() < 59 )
            mdy = 5;
  

        u8g2.setFontMode(1);	// Transparent
        u8g2.setDrawColor(1);

#ifdef MINI_LOGO

        u8g2.setFontDirection(0);
        u8g2.setFont(u8g2_font_inb16_mf);
        u8g2.drawStr(0, 22, "U");
    
        u8g2.setFontDirection(1);
        u8g2.setFont(u8g2_font_inb19_mn);
        u8g2.drawStr(14,8,"8");
    
        u8g2.setFontDirection(0);
        u8g2.setFont(u8g2_font_inb16_mf);
        u8g2.drawStr(36,22,"g");
        u8g2.drawStr(48,22,"\xb2");
    
        u8g2.drawHLine(2, 25, 34);
        u8g2.drawHLine(3, 26, 34);
        u8g2.drawVLine(32, 22, 12);
        u8g2.drawVLine(33, 23, 12);

#else

        u8g2.setFontDirection(0);
        u8g2.setFont(u8g2_font_inb24_mf);
        u8g2.drawStr(0, 30-mdy, "U");
    
        u8g2.setFontDirection(1);
        u8g2.setFont(u8g2_font_inb30_mn);
        u8g2.drawStr(21,8-mdy,"8");
        
        u8g2.setFontDirection(0);
        u8g2.setFont(u8g2_font_inb24_mf);
        u8g2.drawStr(51,30-mdy,"g");
        u8g2.drawStr(67,30-mdy,"\xb2");
    
        u8g2.drawHLine(2, 35-mdy, 47);
        u8g2.drawHLine(3, 36-mdy, 47);
        u8g2.drawVLine(45, 32-mdy, 12);
        u8g2.drawVLine(46, 33-mdy, 12);
    
#endif

    };

    void drawScreen() {
        u8g2.firstPage();
        do {
            drawLogo();
        } while( u8g2.nextPage() );
    };
}

Compiling/building with platformio and mingw gcc/g++ on windows 10 for arduino nano with profile nanoatmega328 btw