So I might see it on Thursday. (Snowdrifts permitting)
The 1.3 inch SSD1315 arrived today !
Apart from an unusual pinout (VCC GND SCL SDA instead of GND VCC SCL SDA)
it works fine with both Adafruit_SSD1306 and with U8g2lib examples.
Fortunately it has 0R resistors to select VCC and GND.
So I have swapped these to get a conventional pinout.
I bought the White 1.3 inch SSD1315 display
1.3 inch SSD1315 is probably happier with a slightly lower contrast setting than the 0.96 inch SSD1306 modules.
But otherwise it behaves just fine.
Please can you post a link to your "problem" SSD1315
Also quote example name that exhibits the problem.
David.