Guide: how to flash ATtiny13a based drivers (NANJG, QLITE, etc.) with custom firmware

Fuses look OK, and that is a good catch - easy to semi-brick the MCU with the wrong fuses.

But code for a 13 will not run correctly on a 25. There are small differences in the setup registers. Mainly to set up the ADC and WDT IIRC. Time-dependent functions will also run a little faster than intended (8 MHz vs. 6.4 MHz).

There is a large thread on the subject:
https://budgetlightforum.com/t/-/34900