The reason is perhaps that you updated your driver between the last use of v1.26.2 (and therefore it was working in it) and the time you noticed it didn't work in v1.26.4 any more...
Isn't it exactly what I told you ?... Twice ?...
If it's not broken, don't "fix" it !... As long as your drivers are working fine, it's not worth updating (and whenever I update, I always keep the old drivers at hand, just in case).