The APX films and the the non APX are different emulsions. AFAIK in the recent decades nothing was changed on Rodinal what affected the development times.
Note: I'm talking abot the bottles from AGFA and A&O (who took over the chemical part from Agfa Photo), not J&C, not Foma, not ADOX, not ORWO, not "original Rodinal" (whatever this is).